According to an embodiment, a location based notification method in a system including a H-SLP (Home-SUPL Location Platform), and a V-SLP (Visited-SLP) having a V-SLC (Visited-SUPL Location Center) and a V-SPC (Visited-SUPL Positioning Center) for a location service, the method comprising: receiving, by the H-SLP, a request for positioning of a roaming terminal; transmitting, by the H-SLP, a session initialization message including a notification mode parameter to the roaming terminal if one or more of location-based notification and verification are required as a result of checking a privacy of the roaming terminal; transmitting and receiving, by the V-SPC, messages with the roaming terminal for performing a positioning process if a positioning start message is received from the roaming terminal.