A base station selecting method of this invention includes the steps of causing each of a plurality of ID transmitters (102) provided in the communication range of a wireless base station (103) to transmit location ID information for identifying the installation location of the ID transmitter (102) by a near field wireless communication scheme, and when a wireless terminal device (101) has received the location ID information, determining a connection destination wireless base station (103) based on the received location ID information. This makes it possible to speed up search processing and switch processing of the wireless base station (103) while suppressing an increase in the cost of the wireless terminal device (101) and also facilitate coverage design and coverage change of the wireless base station (103).