Position detection system and position detection method

A position detection system comprising:

• a first terminal;
• a plurality of second terminals;
• a wireless connection device;
• and
• a position detection server,
• wherein each of the second terminals is disposed in a prescribed position and transmits radio waves in first radio wave intensity,
• wherein the wireless connection device is disposed in a prescribed position, and transmits radio waves in second radio wave intensity which is higher than the first radio wave intensity,
• wherein the first terminal
• measures the radio waves from the wireless connection device or each of the second terminals, and
• transmits a measurement result to the position detection server through the wireless connection device, and
• wherein the position detection server
• maintains first reference data that includes information of a radio wave intensity of the radio waves from the wireless connection device, which is measured by each of the second terminals in a memory,
• receives the measurement result from the first terminal,
• estimates that the first terminal is located in a position of each of the second terminal which has transmitted the radio waves in a case where the measurement result includes information of the radio waves from each of the second terminals, and
• estimates the position of the first terminal based on the information of the radio wave intensity of the radio waves from the wireless connection device, which is included in the measurement result, the first reference data which is maintained in the memory, and a plurality of pieces of positional information of the plurality of second terminals, in a case where the measurement result does not include the information of the radio waves from each of the second terminals.