The accuracy of most advance geology prediction systems available in tunnel construction is not high. In the paper, the problems of TSP203 advance geology prediction system are analyzed in terms of the following aspects: 1) The trigger mode of the data collection system has time delay deviation; 2) There exists acoustic interference; 3) The coupling mode of the detector causes the distortion of the seismic wave signals collected; 4) The data treatment method is too simple. Regarding the problems of TSP203, TGP has made optimizations. TGP emphasizes that comprehensive analysis should be made on basis of the engineering geology knowledge and that other proper geology prediction methods should be adopted to assist TGP. The application of the optimized TGP in tunnel construction demonstrates that the advance geology prediction accuracy has been well improved. 