Indoor positioning system, positioning server, and indoor positioning method

An indoor positioning system applied to detecting a position of a portable device in an indoor environment, the indoor positioning system comprising:

• a first wireless detector, disposed in the indoor environment, in communication with the portable device through a first wireless communication standard, for generating first wireless detecting information corresponding to the portable device;
• a second wireless detector, disposed in the indoor environment, in communication with the portable device through a second wireless communication standard, for generating second wireless detecting information corresponding to the portable device;
• a third wireless detector, disposed in the indoor environment, for generating third wireless detecting information corresponding to the portable device;
• and
• a positioning server, in communication with the first, the third, and the third wireless detectors, for receiving the first wireless detecting information, the second wireless detecting information, and the third wireless detecting information and accordingly retrieving the position of the portable device in the indoor environment.