The influence of the tunnel construction, mining and other human engineering activities leads to the serious drainage of groundwater in Chongqing mountainous area, vegetation destruction, which directly affects the ecological environment of the 5473km2 range of Chongqing urban economic circle. Through the drilling engineering of 20 holes with total drilling footage of 4646m, pumping and water pressure tests were carried out, the evaluation of groundwater quality and quantity in the mountainous area was made. Application of wells TV instrument for continuous imaging in the hole, using the hole logging data and imaging data, established the three-dimensional geological model. Monitoring equipment installed in the hole after completion as long-term observation sites. Real-time monitoring of groundwater dynamic changes can be realized by office computer and various types of charts can be automatically generated to provide hydro-geological parameters for the relevant departments and offers first-hand information for urban planning, engineering design and construction as well as government decision making.