Provided is a travelling self-propelled cleaner device (10) comprising: a scattering member (207) for reflecting or scattering a wireless signal transmitted from an opposing wireless station; a side brush (206) which changes the position of the scattering member (207); an antenna (210) which receives the wireless signal; a radio wave intensity measurement unit (212) which calculates a radio wave intensity from the received wireless signal; and a control unit (213) which, when the radio wave intensity is calculated, causes the position of the scattering member (207) to be changed by the side brush (206). In this way, the self-propelled cleaner device (10) can measure an average radio wave intensity in a short time without requiring an increase in cost or a movement of the body.