The color reproduction capability of the color digital devices directly affects the final rendering effect of color images, and is an important indicator of the performance design of the color digital devices. In order to study the color reproduction ability of different color digital devices under low light, a simple and fast visual objective color reproduction ability evaluation method is proposed. This method firstly converts the RGB three-primary color space to CIELAB color space, and establishes a comprehensive and objective quantitative evaluation index in the CIELAB color space based on CIEDE2000 color difference formula. Finally, a host computer software program is developed based on the VC++ software platform, which can realize the on-site evaluation of the color reproduction ability of color digital equipment. The experimental results show that the evaluation method is in good agreement with the subjective visual perception, and can provide an effective evaluation method for the color reproduction ability of color digital devices in a low light environment.