A new trend in the technology of measurement and testingZHANG Zhong-hua Institute of Electronics and Quantum Sciences, National Institute of Metrology of China, Beijing 100013, ChinaAbstract:Dimension equations and new definitions of the basic units of the International System （SI） were introduced. The new development of mass unit in the National Institute of Metrology of China was described. The dimension of M/T in the ＂ME Balance＂ is Ohm. A device of the mutual inductance measurement was constructed. A method of the low frequency digital compensator was self made. The uncertainty of the model test result, 1.5 × 10^-3, indicated that the measurement uncertainty was mainly originated from the instability of the standard mutual inductance tested and the veracity of measurement positions. When the laser testing system was used, it may be improved. It is important that the ＂ME Balance＂ is one of the measurement projects in the international researches, but not just an imitation of them.[著者文摘]