A sensor network comprising: a server; one or more sensing modules including one or more sensors configured to detect a physical quantity; and at least one generating module including a signal generator configured to generate a signal by varying the physical quantity to be detected by a sensor of the one or more sensors included in a sensing module of the one or more sensing modules, the generating module being configured to communicate installation target information identifying an installation target of the sensor to the server; wherein the generating module further includes a signal control unit configured to control the signal generator to generate the signal that includes a set pattern including a specific pattern; wherein the sensing module further includes a sensing-side communication device configured to communicate with the server, and a pattern detection information transmitting unit configured to transmit to the server, via the sensing-side communication device, pattern detection information generated in response to the sensor detecting the specific pattern and sensor identification information identifying the sensor that has detected the specific pattern; and wherein the server further includes a server-side communication device configured to communicate with the sensing-side communication device, and a storage control unit configured to store association information associating the sensor identification information received by the server-side communication device from the sensing module that has transmitted the pattern detection information with the installation target information transmitted from the generating module that has generated the specific pattern. a server; one or more sensing modules including one or more sensors configured to detect a physical quantity; and at least one generating module including a signal generator configured to generate a signal by varying the physical quantity to be detected by a sensor of the one or more sensors included in a sensing module of the one or more sensing modules, the generating module being configured to communicate installation target information identifying an installation target of the sensor to the server; wherein the generating module further includes a signal control unit configured to control the signal generator to generate the signal that includes a set pattern including a specific pattern; wherein the sensing module further includes a sensing-side communication device configured to communicate with the server, and a pattern detection information transmitting unit configured to transmit to the server, via the sensing-side communication device, pattern detection information generated in response to the sensor detecting the specific pattern and sensor identification information identifying the sensor that has detected the specific pattern; and a sensing-side communication device configured to communicate with the server, and a pattern detection information transmitting unit configured to transmit to the server, via the sensing-side communication device, pattern detection information generated in response to the sensor detecting the specific pattern and sensor identification information identifying the sensor that has detected the specific pattern; and wherein the server further includes a server-side communication device configured to communicate with the sensing-side communication device, and a storage control unit configured to store association information associating the sensor identification information received by the server-side communication device from the sensing module that has transmitted the pattern detection information with the installation target information transmitted from the generating module that has generated the specific pattern. a server-side communication device configured to communicate with the sensing-side communication device, and a storage control unit configured to store association information associating the sensor identification information received by the server-side communication device from the sensing module that has transmitted the pattern detection information with the installation target information transmitted from the generating module that has generated the specific pattern.