1. An image processing apparatus comprising: an operation unit configured to display a screen for designating cooperative processing in which the image processing apparatus and at least one other image processing apparatus cooperate based on externally received information; an interface unit configured to, if the cooperative processing is designated on the screen, receive, from an external source, an execution instruction for processing to be executed by the image processing apparatus for the cooperative processing; and a processing unit configured to execute the processing in accordance with the execution instruction received by the interface unit, wherein the operation unit is further configured to display a status of processing in the at least one other image processing apparatus and controls enabling designation subsequent processing to be executed by the image processing apparatus, based on the externally received information while the at least one other image processing apparatus is executing processing to be executed by the at least one other image processing apparatus for the cooperative processing, after the execution of the processing by the executing unit.