Positioning method and a mobile communication terminal

The user of the mobile communication terminal device, when the positioning request of the current position, in step S101, to check a positioning system positioning method determination unit is designated, performs a cell ID positioning if "cell ID positioning" performs base station radio wave positioning in the case of "base station radio wave positioning", if "GPS positioning" or "no designation", in step S102, the area of ​​location of the mobile communication terminal, data communication it is determined whether the corresponding area. If the data communication whether the corresponding area determination is negative, performs an autonomous GPS positioning. If affirmative performs assisted GPS positioning. Here, if it fails to assist GPS positioning, in assisted GPS positioning failure processing in step S108, when the predetermined condition further, autonomous GPS positioning, or performs a complementary cell ID positioning.