A problem that it is difficult to associate a log of processing executed in a web browser of an image forming apparatus with a log of processing executed in a web application server, and thus it is difficult to track the logs as a series of processing logs. The image processing apparatus receives an execution request of a function of the image forming apparatus and obtains identification information for a log of processing executed in the server apparatus in response to the received execution request of the function. The image forming apparatus stores a log of processing in the image forming apparatus related to the processing in the server apparatus corresponding to the obtained identification information, in association with the obtained identification information.