Abstract: The moisture content in foods is an important indicator of food quality control,and it is determined by direct measurement devices and indirect measurement devices. Direct measurement devices mainly include dryer,drying oven,distillation device,Karl Fischer moisture analyzer,halogen moisture analyzer,infrared moisture analyzer,microwave moisture analyzer. Indirect measurement devices mainly include Abbe refractometer,resistor-container moisture analyzer,near infrared composition analyzers,nuclear magnetic resonance spectrometer,and hyper-spectral imaging system. This paper summarized the basic structure,measuring principle,application,advantages and disadvantages of the moisture contents measuring device in food,and would provide reference for the selection and use of the moisture content measuring device in food.