diff --git a/demo/documentation/components/form/enUS/inline.md b/demo/documentation/components/form/enUS/inline.md
index 18c80cf2b..bc5a910a5 100644
--- a/demo/documentation/components/form/enUS/inline.md
+++ b/demo/documentation/components/form/enUS/inline.md
@@ -6,13 +6,13 @@
   :value="formValue"
   ref="form"
 >
-  <n-form-item label="Name" path="name">
-    <n-input v-model="formValue.name" placeholder="Input Name" />
+  <n-form-item label="Name" path="user.name" required>
+    <n-input v-model="formValue.user.name" placeholder="Input Name" />
   </n-form-item>
-  <n-form-item label="Age" path="age">
-    <n-input placeholder="Input Age" v-model="formValue.age"/>
+  <n-form-item label="Age" path="user.age" required>
+    <n-input placeholder="Input Age" v-model="formValue.user.age"/>
   </n-form-item>
-  <n-form-item label="Phone" path="phone">
+  <n-form-item label="Phone" path="phone" required>
     <n-input placeholder="Phone Number" v-model="formValue.phone"/>
   </n-form-item>
   <n-form-item v-model="formValue.phone">
@@ -29,8 +29,10 @@ export default {
   data () {
     return {
       formValue: {
-        name: '',
-        age: '',
+        user: {
+          name: '',
+          age: ''
+        },
         phone: ''
       }
     }
diff --git a/packages/common/Form/src/FormItem.vue b/packages/common/Form/src/FormItem.vue
index 79697d128..38c02c781 100644
--- a/packages/common/Form/src/FormItem.vue
+++ b/packages/common/Form/src/FormItem.vue
@@ -26,7 +26,12 @@
     >
       <slot />
       <div :class="`n-form-item-explain`">
-        {{ explain }}
+        <transition name="n-fade-down">
+          <span
+            v-if="explain"
+            class="n-form-item-explain__content"
+          >{{ explain }}</span>
+        </transition>
       </div>
     </div>
   </div>
@@ -131,10 +136,17 @@ export default {
     },
     synthesizedRules () {
       let rules = []
+      const validator = (rule, value) => {
+        if (value !== undefined && value !== null && value !== '') {
+          return true
+        }
+        return Error(`${this.label || this.path} is required!`)
+      }
       if (this.required) {
         rules.push({
-          trigger: 'blur',
-          required: true
+          trigger: ['blur', 'change', 'input'],
+          required: true,
+          validator
         })
       }
       if (this.rule) {
@@ -156,6 +168,11 @@ export default {
     }
   },
   created () {
+    /**
+     * This is buggy!
+     * Because if it's child change, rules is not updated
+     * However I need to make it work first
+     */
     this.addValidationEventListeners()
   },
   methods: {
@@ -165,6 +182,12 @@ export default {
     handleContentChange () {
       this.validate('change')
     },
+    handleContentFocus () {
+      this.validate('focus')
+    },
+    handleContentInput () {
+      this.validate('input')
+    },
     validate (trigger = null, callback = null) {
       if (!this.path) {
         return
@@ -172,10 +195,17 @@ export default {
       const rules = this.synthesizedRules
       const path = this.path
       const value = get(this.NForm.value, this.path, null)
-      const activeRules = !trigger ? rules : rules.filter(rule => rule.trigger === trigger)
+      const activeRules = !trigger ? rules : rules.filter(rule => {
+        if (Array.isArray(rule.trigger)) {
+          return rule.trigger.includes(trigger)
+        } else {
+          return rule.trigger === trigger
+        }
+      })
       if (!activeRules.length) return
       const asyncValidator = new AsyncValidator({ [path]: activeRules })
       asyncValidator.validate({ [path]: value }, (errors, fields) => {
+        console.log('validate', errors, fields)
         if (errors) {
           this.explain = errors[0].message
           this.validated = true
@@ -192,8 +222,10 @@ export default {
     addValidationEventListeners () {
       const rules = this.synthesizedRules
       if (rules.length >= 0) {
-        this.$on('form-item-blur', this.handleContentBlur)
-        this.$on('form-item-change', this.handleContentChange)
+        this.$on('blur', this.handleContentBlur)
+        this.$on('input', this.handleContentInput)
+        this.$on('focus', this.handleContentFocus)
+        this.$on('change', this.handleContentChange)
       }
     }
   }
diff --git a/packages/common/Form/src/main.vue b/packages/common/Form/src/main.vue
index 4a3dc58b7..4388cc1ca 100644
--- a/packages/common/Form/src/main.vue
+++ b/packages/common/Form/src/main.vue
@@ -29,7 +29,7 @@ export default {
     },
     labelPosition: {
       type: String,
-      default: 'top' // ['top', 'right', 'left', 'center']
+      default: 'top'
     },
     value: {
       type: Object,
diff --git a/packages/common/Input/src/main.vue b/packages/common/Input/src/main.vue
index 2a5901135..c30049285 100644
--- a/packages/common/Input/src/main.vue
+++ b/packages/common/Input/src/main.vue
@@ -124,22 +124,17 @@
 </template>
 
 <script>
-import Emitter from '../../../mixins/emitter'
 import NCancelMark from '../../../base/CancelMark'
 import withapp from '../../../mixins/withapp'
 import themeable from '../../../mixins/themeable'
+import asformitem from '../../../mixins/asformitem'
 
 export default {
   name: 'NInput',
   components: {
     NCancelMark
   },
-  mixins: [ withapp, themeable, Emitter ],
-  inject: {
-    NFormItem: {
-      default: null
-    }
-  },
+  mixins: [ withapp, themeable, asformitem() ],
   props: {
     type: {
       type: String,
@@ -322,9 +317,6 @@ export default {
         this.focus = false
         this.triggerBlur(e)
       }
-      if (this.NFormItem) {
-        this.dispatch('NFormItem', 'form-item-blur', e.target.value)
-      }
     },
     handleInputFocus (e) {
       this.$emit('input-focus')
@@ -347,9 +339,6 @@ export default {
       this.$emit('keyup', e)
     },
     handleChange (e) {
-      if (this.NFormItem) {
-        this.dispatch('NFormItem', 'form-item-change', e.target.value)
-      }
       this.$emit('change', e.target.value)
     },
     handleClick (e) {
diff --git a/packages/mixins/asformitem.js b/packages/mixins/asformitem.js
new file mode 100644
index 000000000..98b864003
--- /dev/null
+++ b/packages/mixins/asformitem.js
@@ -0,0 +1,24 @@
+export default function (events = {
+  change: 'change',
+  blur: 'blur',
+  focus: 'focus',
+  input: 'input'
+}) {
+  return {
+    inject: {
+      NFormItem: {
+        default: null
+      }
+    },
+    created () {
+      Object.keys(events).forEach(event => {
+        const asEvent = events[event]
+        this.$on(event, function (value) {
+          if (this.NFormItem) {
+            this.NFormItem.$emit(asEvent, value)
+          }
+        })
+      })
+    }
+  }
+}
diff --git a/styles/Form.scss b/styles/Form.scss
index c1bd7af60..99ecbd2dd 100644
--- a/styles/Form.scss
+++ b/styles/Form.scss
@@ -6,13 +6,15 @@
   font-size: 14px;
   color: rgba(255, 255, 255, 1);
   @include m(inline) {
-    width: auto;
+    width: 100%;
     display: inline-flex;
     align-items: flex-end;
     align-content: space-around;
-    flex-wrap: nowrap;
-    .n-form-item:not(:last-child) {
-      margin-right: 10px;
+    @include b(form-item) {
+      width: auto;
+      &:last-child {
+        margin-right: 0;
+      }
     }
   }
   .n-form-item__label--top {
@@ -71,21 +73,25 @@
     height: 22px;
     box-sizing: border-box;
     font-size: 13px;
-    flex-grow: 0;
-    overflow-wrap: break-word;
-    @include e(span) {
-      display: inline-block;
-    }
   }
   @include b(form-item-content) {
     position: relative;
     flex-grow: 1;
   }
   @include b(form-item-explain) {
-    min-height: 22px;
+    box-sizing: border-box;
+    margin-top: 4px;
+    min-height: 20px;
     line-height: 1.5;
     color: rgba(255, 146, 164, 1);
-    font-size: 14px;
+    font-size: 13px;
+    padding-left: 2px;
+    transform-origin: top left;
+    @include e(content) {
+      display: inline-block;
+      @include fade-down-transition($from-offset: -3px);
+      // @include fade-in-scale-up-transition();
+    }
   }
   .n-form-item__content--pass {
     .n-form-item__validate {
diff --git a/styles/themes/vars.scss b/styles/themes/vars.scss
index 9a4fa2c54..740d8f886 100644
--- a/styles/themes/vars.scss
+++ b/styles/themes/vars.scss
@@ -220,20 +220,37 @@ $default-cubic-bezier: cubic-bezier(.4, 0, .2, 1);
   }
 }
 
+@mixin fade-down-transition ($name: 'fade-down', $from-offset: -4px) {
+  &.#{$namespace}-#{$name}-enter, &.#{$namespace}-#{$name}-leave-to {
+    opacity: 0;
+    transform: translateY($from-offset);
+  }
+  &.#{$namespace}-#{$name}-enter-to, &.#{$namespace}-#{$name}-leave {
+    opacity: 1;
+    transform: translateY(0);
+  }
+  &.#{$namespace}-#{$name}-leave-active {
+    transition: opacity .3s $default-cubic-bezier, transform .3s $default-cubic-bezier;
+  }
+  &.#{$namespace}-#{$name}-enter-active {
+    transition: opacity .3s $default-cubic-bezier, transform .3s $default-cubic-bezier;
+  }
+}
+
 @mixin fade-up-transition($block) {
-  .#{$namespace}-#{$block}--transition-enter, .#{$namespace}-#{$block}--transition-leave-to {
+  &.#{$namespace}-#{$block}--transition-enter, .#{$namespace}-#{$block}--transition-leave-to {
     opacity: 0;
     transform: translateY(4px);
   }
-  .#{$namespace}-#{$block}--transition-leave-active {
+  &.#{$namespace}-#{$block}--transition-leave-active {
     transition: opacity .3s $slow-out-cubic-bezier, transform .3s $slow-out-cubic-bezier;
   }
-  .#{$namespace}-#{$block}--transition-enter-active {
+  &.#{$namespace}-#{$block}--transition-enter-active {
     transition: opacity .3s $fast-in-cubic-bezier, transform .3s $fast-in-cubic-bezier;
   }
 }
 
-@mixin fade-in-scale-up-transition($block: 'fade-in-scale-up', $origin: inherit, $duration: .2s) {
+@mixin fade-in-scale-up-transition($block: 'fade-in-scale-up', $origin: inherit, $duration: .2s, $start-scale: 0.9) {
   &.#{$namespace}-#{$block}--transition-leave-active {
     transform-origin: $origin;
     transition: opacity $duration $slow-out-cubic-bezier, transform $duration $slow-out-cubic-bezier;
@@ -244,7 +261,7 @@ $default-cubic-bezier: cubic-bezier(.4, 0, .2, 1);
   }
   &.#{$namespace}-#{$block}--transition-enter, &.#{$namespace}-#{$block}--transition-leave-to {
     opacity: 0;
-    transform: scale(.9);
+    transform: scale($start-scale);
   }
   &.#{$namespace}-#{$block}--transition-leave, &.#{$namespace}-#{$block}--transition-enter-to {
     opacity: 1;