Digital quantity input and output module test system and test method

The invention discloses a digital quantity input and output module test system and method, and the system comprises a voltage signal conversion device which is connected with an industrial personal computer and a digital input terminal of a digital quantity input and output module, and converts an input voltage into a voltage test signal under the control of the industrial personal computer, and inputs a voltage test signal to the digital quantity input and output module, a signal generator which is connected with the industrial personal computer and an analog input terminal of the digital quantity input and output module, and is used for generating an analog test signal under the control of the industrial personal computer, and inputting an analog test signal to the digital quantity input and output module, and an industrial personal computer which is also connected with the digital output terminal and the analog output terminal of the digital quantity input and output module and is used for receiving operat