A method for providing a location value of a Target (SET) in a location information providing system is provided, wherein an Home Secure User Plane Location (SUPL) Location Platform (H-SLP) also checks a period for a positioning and it transmits a positioning start inducing message to the Target SET if an Secure User Plane Location (SUPL) TRIGGERED START message does not arrive from the Target SET within a specific time interval from a beginning of the corresponding period. Therefore, there is a complementary effect on that the positioning can be performed in the preset period.