This standard specifies the test methods for the determination of moisture regain or moisture content of ramie, refined hemp, water hemp and oil hemp, including sampling, test conditions, test period, test instruments and test methods, etc. Sampling is carried out in accordance with the "sampling method for physical and chemical performance test of ramie". The test can be carried out under general atmospheric conditions, and periodic tests can be carried out according to production needs. The test instruments include Glass instruments, weighing instruments and heating and drying equipment. The test methods include the method for determining moisture regain or moisture content in quantitative analysis of chemical composition of raw ramie and the method for separately determining moisture regain and moisture content.