In order to meet the current demand for online real-time detection of dangerous goods in public places, a handheld raman spectrometer data acquisition system is designed. The system consists of a laser module, a micro spectrometer module, a power supply module and an ARM main control module.After many tests and verification experiments, the results show that the prototype is 18.7cm long, 9.2cm wide, 4.4cm high, weighs about 0.42kg, and has an optical resolution of up to 1.5nm. The test samples—absolute ethanol, methanol, and ethyl acetate are tested and their raman response curves are analyzed. It is concluded that the instrument can make the output raman spectrum characteristic peaks match 98.7% within 6s.The instrument is small in size, light in weight, and high in resolution. It can quickly and accurately detect the properties of the object to be tested, which has extremely high application value and broad market prospects.