Established two sets of orifice height measurement system for mutual verification, which proved that the height error for the orifice was less than 8cm. The high-density seismic reflection prospecting in waters detected a depth of 150m precisely. The water-pumping testing with double observation holes has been carried out successfully in the sea. Advanced intelligent underwater tracer was adopted, which ensured reliable and scientific testing. Comprehensive prospecting method was adopted to investigate the geological and hydrogeological conditions of the site, and find out the distribution of bad geology and special rock and soil.