diff --git a/index.js b/index.js
index 6d5cb55..733ad48 100644
--- a/index.js
+++ b/index.js
@@ -316,11 +316,11 @@ function checkInt(rule, value) {
   }
 
   if (rule.hasOwnProperty('max') && value > rule.max) {
-    return this.t('should smaller than %s', rule.max);
+    return this.t('should not bigger than %s', rule.max);
   }
 
   if (rule.hasOwnProperty('min') && value < rule.min) {
-    return this.t('should bigger than %s', rule.min);
+    return this.t('should not smaller than %s', rule.min);
   }
 }
 
@@ -342,10 +342,10 @@ function checkNumber(rule, value) {
     return this.t('should be a number');
   }
   if (rule.hasOwnProperty('max') && value > rule.max) {
-    return this.t('should smaller than %s', rule.max);
+    return this.t('should not bigger than %s', rule.max);
   }
   if (rule.hasOwnProperty('min') && value < rule.min) {
-    return this.t('should bigger than %s', rule.min);
+    return this.t('should not smaller than %s', rule.min);
   }
 }
 
@@ -385,10 +385,10 @@ function checkString(rule, value) {
   }
 
   if (rule.hasOwnProperty('max') && value.length > rule.max) {
-    return this.t('length should smaller than %s', rule.max);
+    return this.t('length should not bigger than %s', rule.max);
   }
   if (rule.hasOwnProperty('min') && value.length < rule.min) {
-    return this.t('length should bigger than %s', rule.min);
+    return this.t('length should not smaller than %s', rule.min);
   }
 
   if (rule.format && !rule.format.test(value)) {
@@ -582,10 +582,10 @@ function checkArray(rule, value) {
   }
 
   if (rule.hasOwnProperty('max') && value.length > rule.max) {
-    return this.t('length should smaller than %s', rule.max);
+    return this.t('length should not bigger than %s', rule.max);
   }
   if (rule.hasOwnProperty('min') && value.length < rule.min) {
-    return this.t('length should bigger than %s', rule.min);
+    return this.t('length should not smaller than %s', rule.min);
   }
 
   if (!rule.itemType) {
diff --git a/test/index.test.js b/test/index.test.js
index 1a39b48..23e5b06 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -116,13 +116,13 @@ describe('parameter', () => {
     it('should check max error', () => {
       var value = { int: 101 };
       var rule = { int: {type: 'int', max: 100, min: 1 }};
-      parameter.validate(rule, value)[0].message.should.equal('should smaller than 100');
+      parameter.validate(rule, value)[0].message.should.equal('should not bigger than 100');
     });
 
     it('should check min error', () => {
       var value = { int: -1 };
       var rule = { int: {type: 'int', max: 100, min: 0 }};
-      parameter.validate(rule, value)[0].message.should.equal('should bigger than 0');
+      parameter.validate(rule, value)[0].message.should.equal('should not smaller than 0');
     });
   });
 
@@ -149,13 +149,13 @@ describe('parameter', () => {
     it('should check max error', () => {
       var value = { number: 101 };
       var rule = { number: {type: 'number', max: 100, min: 1 }};
-      parameter.validate(rule, value)[0].message.should.equal('should smaller than 100');
+      parameter.validate(rule, value)[0].message.should.equal('should not bigger than 100');
     });
 
     it('should check min error', () => {
       var value = { number: -1 };
       var rule = { number: {type: 'number', max: 100, min: 0 }};
-      parameter.validate(rule, value)[0].message.should.equal('should bigger than 0');
+      parameter.validate(rule, value)[0].message.should.equal('should not smaller than 0');
     });
   });
 
@@ -184,13 +184,13 @@ describe('parameter', () => {
     it('should check max error', () => {
       var value = { string: 'hello' };
       var rule = { string: {type: 'string', max: 4, min: 1 }};
-      parameter.validate(rule, value)[0].message.should.equal('length should smaller than 4');
+      parameter.validate(rule, value)[0].message.should.equal('length should not bigger than 4');
     });
 
     it('should check min error', () => {
       var value = { string: 'hello' };
       var rule = { string: {type: 'string', max: 100, min: 10 }};
-      parameter.validate(rule, value)[0].message.should.equal('length should bigger than 10');
+      parameter.validate(rule, value)[0].message.should.equal('length should not smaller than 10');
     });
 
     it('should check format error', () => {
@@ -432,7 +432,7 @@ describe('parameter', () => {
         {
           code: 'invalid',
           field: 'password',
-          message: 'length should bigger than 6'
+          message: 'length should not smaller than 6'
         }
       ]);
 
@@ -449,7 +449,7 @@ describe('parameter', () => {
         {
           code: 'invalid',
           field: 'password',
-          message: 'length should bigger than 4'
+          message: 'length should not smaller than 4'
         }
       ]);
     });
@@ -622,13 +622,13 @@ describe('parameter', () => {
     it('should check max error', () => {
       var value = {array: [0, 1, 2, 3, 4]};
       var rule = {array: {type: 'array', itemType: 'int', max: 4, min: 1}};
-      parameter.validate(rule, value)[0].message.should.equal('length should smaller than 4');
+      parameter.validate(rule, value)[0].message.should.equal('length should not bigger than 4');
     });
 
     it('should check min error', () => {
       var value = {array: [0, 1, 2, 3, 4]};
       var rule = {array: {type: 'array', itemType: 'int', max: 100, min: 10}};
-      parameter.validate(rule, value)[0].message.should.equal('length should bigger than 10');
+      parameter.validate(rule, value)[0].message.should.equal('length should not smaller than 10');
     });
 
     it('should check itemType=object error', () => {
@@ -1115,4 +1115,4 @@ describe('validate with options.convert', function() {
       });
     });
   });
-});
+});
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