To ensure a communication environment enhancing the convenience by notifying users of the state of a device such as communication state, job processing state or the like.

An image forming device 11 performs wireless communications by a communication unit 11a with the external communication device, manages by detecting the it's own state by means of management tables 13e-13h, recognizes contents which is managed by a process control unit 13c, and determines whether to output a response to the outside or not in accordance with the recognition for connection requests from the external communication device. The external communication device decides that the communication is possible if the response is output; the communication is not possible for a while if the response is not output. Thus, a user environment and a communication environment which prevent unnecessary communication access and enhance the convenience are provided.