PURPOSE: An electronic device, a control method thereof, and an application testing system are provided to enable the electronic device to receive and display the execution image of an application which is executed and processed in an emulating device, thereby easily performing a test for the operation of the application in hardware environment corresponding to a target device. CONSTITUTION: A communication unit (520) of at least one or more electronic devices (500) communicates with a server (610), to which at least one or more emulating devices (620) are locally connected, through a network. A control unit (540) is connected to the server, and transmits an application stored in a storage unit (530) to the emulating device. The control unit receives the execution image of the application, which is processed and executed in the emulating device, from the emulating device. The control unit displays the received execution image on a display unit (510). [Reference numerals] (510) Display unit; (520) Communication unit; (530) Storage unit; (540) Control unit; (610) Server; (620) Emulating device