Abstract: In order to achieve panoramic, dynamic, high definition and remote video monitoring in fully-mechanized coal face, low ilumination video technology was applied to monitoring system of fully-mechanized coal face.Application principle of low illumination video enhancement technology and image data processing method i n underground mine were introduced, combined with optical formula of tone mapping function and others, angle of vision parameters of video monitoring camera was ob tained.Through field application verification, the application of low ilumination video technology to monitoring system of fully-mechanized coal face had superiority real- time, good fluency, high definition, and others.Remote monitoring and other functions of shearers, hydraulic support and other equipments in complex and harsh enviro nments of fully-mechanized coal face could be achieved.