An image processing apparatus of the present invention includes a display control unit that displays an operation screen based on screen information provided from a Web server, and transmits input information for the operation screen to the Web server, and an execution control unit that executes a job according to an execution request received from the Web server. The execution control unit, when starting execution of the job, notifies the Web server of a corresponding job ID. The display control unit displays, based on screen information received from the Web server together with the job ID, an operation screen related to the job which is being executed. When an instruction related to the job is input via the operation screen, the display control unit, upon determining that a predetermined condition is satisfied, instructs the execution control unit to control execution of the job without the intervention of the Web server.