After being reminded by @lee1994522, I realized that if the $.post method is used, then 脱离了angular的上下文 it cannot be bound to Angular’s ​​$scope.

this is the point,pls.. $.post is not an Angular issue and the stuff
it wraps is not in an Angular world,so it's obviously that the
equipments outside is in Angular's world and it works as you expect

try $scope.$apply() when you call a "none Angular" issue if you wanna
refresh sth

There are two solutions:

$.post

The first one is as @lee1994522 said, directly add a sentence $scope.$apply() at the end of the $.post callback function to synchronously bind the changes to the view

$.post("xxx.action",
            {},
            function(response){
                if(response.result == "success"){
                    ...
                    }
                    $scope.equipments = equipments; 
                    $scope.$apply();
                }
            },
            "json"
    );

$http.post

AngularJS - Any way for $http.post to send request parameters instead of JSON

Global definition:

var app = angular.module('myApp');

app.config(function ($httpProvider) {
    $httpProvider.defaults.transformRequest = function(data){
        if (data === undefined) {
            return data;
        }
        return $.param(data);
    }
    $httpProvider.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8';
});

Then write in the controller:

   $http.post("xxx.action").success(function(response) {  
            ...
            $scope.equipments = equipments; 
    });

I don’t understand the original poster’s use of $.post. What’s the point of injecting $http

Your$.post不是angular的方法，所以实际上post的回调虽然执行了，但angular在视图上却不知道这件事。你可以在$.post里的赋值操作后面再跟一句$scope.$apply();, that assignment operation will take effect.