Aiming to the verification requirement of thermotechnical instrument in oil field, we designed a thermotechnical metrological verification vehicle that we can use in the field. The vehicle is composed of power supply system, air condition system, safety protection system, vehicle experimentation area, data processing system, temperature verification system and pressure testing system. It not only provides a variety of experimental environment and calibration equipment, but also realizes the automation of field metrological and calibration process. It improves the work efficiency , and meets the needs of field metrological and calibration.