In a photometric system, a photosensor-equipped unit includes a transmission information holding portion that holds transmission information relating to a screen display direction of a display portion with a content suitable for a photosensor. When the photosensor-equipped unit is connected to a display processing terminal device, the photosensor-equipped unit can transmit the transmission information to the display processing terminal device. The display processing terminal device includes a screen display control portion that executes a display direction setting process during connection for setting a screen display direction of the display portion based upon the transmission information.