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Broadly speaking, almost every physical experiment requires measurements of physical quantities. Therefore, physical quantities measuring plays a vital role in physical experiments. Measurements of physical quantities refer to the measuring process based on physical theory by experimental apparatus and technologies. In principle, the physical quantities to be measured involve mechanics,thermotics, electromagnetics and optics. All measurements aim to come up with accurate values by reducing measuring errors under given experimental conditions. In this chapter, six different basic methods are briefly introduced.