Asthe production technology is being improved and the market competition is being upgraded, online verification technology is used widely to ensure the product quality and economic benefits. This paper introduces the limitations of offline verification and the necessity of online verificationbriefly. Several techniques for supporting online verification are also introduced. They are sensor technology, highspeed photography technology, laser Doppler technology and CCD technology. Contact and noncontact online verification are theapplication for cable length meter calibration. Then as a new verificationand calibration institute, we shouldstrive forusing online verification to support new production.