The invention provides an orientation identification method and a recording medium. The orientation identification method for identifying an orientation of a device (1) installed by being mounted on amoving body (2) includes: an obtaining step (S1) of obtaining a certain amount of acceleration in three mutually orthogonal directions detected by an acceleration sensor included in the device (1); and an identifying step (S1) of identifying the orientation of the device (1) expressed in a coordinate system from acceleration data indicating the certain amount of acceleration obtained in the obtaining step (1), according to movement characteristics indicated by statistics of acceleration during movement of the moving body expressed in the coordinate system, the coordinate system including a gravitational acceleration direction as an axis.