In order to improve efficiency, release the burden of the staff and reduce the equipments’ backups, comparative analysis work aimed at principle, adaptability, position precision and its influence factors between multi-sites location system using TDOA(Time Difference of Arrival) and multi-directional position system has been done. The application range field and adaptability of these two position location systems mentioned above has been cleared and defined. And some rules for configuring the test equipments to obey have been proposed.