A measurement device of the present invention includes a measurement portion for acquiring measured data from a sensor; a memory portion for storing the measured data; a radio portion for performing radio transmission/reception of the measured data; a PC interface portion for transmitting the measured data to a host computer via the universal interface; and a control portion for controlling the measurement portion, memory portion, radio portion, and PC interface portion, the control portion has a switching function for setting a mode by selecting between a remote mode and base mode; in the remote mode, the measured data acquired by the measurement portion are stored in the memory portion and transmitted by the radio portion, and in the base mode, the measured data acquired from the radio portion are stored in the memory portion and transmitted to the host computer by the PC interface portion. This measurement device allows construction of the measurement system capable of performing wireless measured data collection with the measurement devices of a single set of specifications. Therefore, the measurement system can be constructed in easy and flexible manner.