When storing captured image data in an information server, a mobile information terminal transmits related information (date and time information, location information, direction angle information, information of a distance to a subject, and user identification information) at the time of imaging to the information server. In addition, when making a request for the image data stored in the information server, current terminal information and image search conditions describing image data replay conditions are transmitted to the information server. The information server searches for corresponding image data based on the current terminal information and the image search conditions and transmits the corresponding image data to the mobile information terminal. The mobile information terminal displays the received image data on the display unit as a related image. Therefore, a user can effectively recall the memories, such as a situation or impression at the time of imaging.