Disclosed is a wireless communication system capable of easily reconnecting a mobile information terminal and a base unit when a user returns home and letting the user know missed incoming call information or the like. To this end, when being unable to receive a signal from the base unit, the mobile information terminal enters into a sleep state, and when a predetermined operation is performed, the mobile information terminal searches for the base unit, and when reconnecting to the base unit, the terminal displays information on an item transmitted from the base unit on an operation display section. Thus, even when the user returns home but forgets switching an operation mode, the mobile information terminal searches for the base unit as soon as the predetermined operation is performed, and can obtain necessary information from the base unit at home by a simple operation when the user desires the information.