1. An electronic device, comprising: a processing system, arranged to execute an application; and a management circuit, arranged to detect an operating behavior of the application during execution of the application, analyze the detected operating behavior of the application to generate an application identification result which indicates if the application is a specific application, and configure an application-dependent task according to at least the application identification result, wherein the application-dependent task comprises adjusting operating frequency and operating voltage of a processor of the processing system, and the application-dependent task is a dynamic thermal management (DTM) task; wherein the management circuit comprises: an application behavior database, arranged to store operating behaviors of a plurality of specific applications; a classification unit, arranged to detect the operating behavior of the application, and determine the application identification result by checking if the detected operating behavior of the application is classified as one of the operating behaviors of the specific applications; a control unit, arranged to determine a task setting at least based on application behavior information of the application and configure the application-dependent task by the task setting when the application identification result indicates that the application is classified as one of the specific application, wherein the task setting is a thermal strategy for the application.