A server for use in a position measuring system that includes the server and a plurality of radio wave emitting stations positioned at different locations across a position measuring area, the server comprising: a communication interface configured to communicate with a plurality of portable devices that are moved through the position measuring area; a storage device that stores, for each of the plurality of radio wave emitting stations, a beacon identifier that uniquely identifies the radio wave emitting station and a first threshold time; a display device; and a processor configured to: receive, from each portable device via the communication interface, reception information including: a reception time indicating when the portable device received a signal from one of the plurality of radio wave emitting stations, a received signal strength identifier indicating a strength of the signal received by the portable device, and a beacon identifier corresponding to the received signal, characterized in that the processor determines an operation state of each radio wave emitting station corresponding to the received signal based on whether a difference between the last reception time received and a current time, exceeds the first threshold time stored with respect to the radio wave emitting station corresponding to the beacon identifier included in the received reception information, and control the display device to display information indicating the determined operation state of each of the plurality of radio wave emitting stations. a communication interface configured to communicate with a plurality of portable devices that are moved through the position measuring area; a storage device that stores, for each of the plurality of radio wave emitting stations, a beacon identifier that uniquely identifies the radio wave emitting station and a first threshold time; a display device; and a processor configured to: receive, from each portable device via the communication interface, reception information including: a reception time indicating when the portable device received a signal from one of the plurality of radio wave emitting stations, a received signal strength identifier indicating a strength of the signal received by the portable device, and a beacon identifier corresponding to the received signal, characterized in that the processor determines an operation state of each radio wave emitting station corresponding to the received signal based on whether a difference between the last reception time received and a current time, exceeds the first threshold time stored with respect to the radio wave emitting station corresponding to the beacon identifier included in the received reception information, and control the display device to display information indicating the determined operation state of each of the plurality of radio wave emitting stations. receive, from each portable device via the communication interface, reception information including: a reception time indicating when the portable device received a signal from one of the plurality of radio wave emitting stations, a received signal strength identifier indicating a strength of the signal received by the portable device, and a beacon identifier corresponding to the received signal, characterized in that the processor determines an operation state of each radio wave emitting station corresponding to the received signal based on whether a difference between the last reception time received and a current time, exceeds the first threshold time stored with respect to the radio wave emitting station corresponding to the beacon identifier included in the received reception information, and a reception time indicating when the portable device received a signal from one of the plurality of radio wave emitting stations, a received signal strength identifier indicating a strength of the signal received by the portable device, and a beacon identifier corresponding to the received signal, characterized in that the processor determines an operation state of each radio wave emitting station corresponding to the received signal based on whether a difference between the last reception time received and a current time, exceeds the first threshold time stored with respect to the radio wave emitting station corresponding to the beacon identifier included in the received reception information, and control the display device to display information indicating the determined operation state of each of the plurality of radio wave emitting stations.