Based on water quantity, water quality and exploitation conditions, combined with the status of water supply facilities in Taizhou urban planning area, three valley pore phreatic water sources and two pore confined aquifer groundwater emergency water sources were selected as priority choices, and a pore-confined water underground flow and solute transport simulation model was established by visual MODFLOW. The allowable yield of valley phreatic water source is 455.53×104 m3/a and the annual total supply of pore-confined water is 472.3×104 m3. A warning system including level three, level two and level one is set up following the principle of emergency water supply. The results can meet the requirements of emergency water supply. The geological environment problems such as land subsidence and salt water intrusion after emergency exploitation are predicted and evaluated. The results show that the ground subsidence is relatively controllable, of which the maximum is 14.2mm of level one, and the movement of interface between fresh and saline water is not obvious.