A sensor device includes a data acquisition unit configured to acquire different types of measurement data from a plurality of sensors that measure the measurement data, an event determination unit configured to determine that an event occurs when the measurement data satisfies an event condition corresponding to the occurrence of the event, and a transmission controller configured to transmit transmission data in which the measurement data is stored in a predetermined data format. The transmission controller varies the data format of the transmission data in a case where the event does not occur and in a case where the event occurs.