To suppress the power consumption of a device to the minimum, and to extend the available time of a communication terminal as much as possible in a device capable of waiting for the simultaneous reception of signals in different communication systems.

This composite communication terminal equipment 100 capable of performing the transmission and reception of signals in a PHS system and a PDC system, and waiting for the simultaneous reception of signals in both systems is provided with a PHS transmitting and receiving part 104 and a PDC transmitting and receiving part 106 for transmitting and receiving signals in the respective systems, a PHS control part 105 and a PDC control part 107 for controlling the transmission and reception of signals in the respective systems, and a power source part 108 for monitoring a residual battery 109. The PDC control part 107 controls the simultaneous reception waiting mode of signals, and when the residual battery 109 is turned into a prescribed value or less, the PDC control part 107 releases the simultaneous reception waiting mode, and automatically switches this simultaneous reception waiting mode to a reception waiting mode of signals in either the PHS system or the PDC system, and stops the other reception waiting mode.