A controller device is used for more information processes. The controller device is capable of wirelessly communicating with an information processing device. The controller device includes a communication unit, a display unit, and a program executing unit. The communication unit transmits, to the information processing device, operation data obtained based on an operation performed on the controller device, and receives, from the information processing device, image data generated in the information processing device through a process performed based on operation data. A display unit displays an image represented by the image data received from the information processing device. When a predetermined operation on the controller device is performed, the program executing unit executes a predetermined program and displays at least the image resulting from the execution of the program on the display unit. The communication unit transmits, to the information processing device, data indicating that the predetermined program is being executed.