The invention relates to an application object attribute updating method and device and an application platform. The method includes: establishing object attribute update tasks for an application by task configuration to obtain a task list; extracting each task from the task list, and analyzing the task configuration information to obtain corresponding source attribute information and target attribute information of the application; according to the corresponding source attribute information of the application, finding a corresponding application object from a database; revising current attribute information of the corresponding application object into target attribute information; rewriting the revised target attribute information as current attribute information of the application object into the database. The object attribute update tasks for the application are established by task configuration, each task is executed according to the task configuration information, revising the attribute information of the application object is automatically finished, and application object attribute updating efficiency is improved; in addition, a review mechanism can be introduced for the revised attribute information, and network application data security is improved accordingly.