Shezhen bay is a shallow water bay along east coast of Pearl estuary, China. For the sake of engineering, we need investigate the structure and spatial distribution of submarine stratification. This is a geomorphology and Quaternary research which supplies service for engineering within a small region, as well as a new experiment in spatial analysis of marine strata applying comprehensively the modern 3-G techniques ---GPS, GEOPULSE, GIS. The field work includes two aspects: one is the geomorphological and quaternary survey in Shenzhen bay and along its coast, the objective is to investigate the original geomorphological characteristics and the rough sketch of environmental evolution; the other is the survey in submarine stratification, mainly using GPS (Model 1008-586), GEOPULSE (5210A). Renting the steel hull ship that its load is 200 tons and light draught is 0.5m, we arranged the measuring line in NS and WE to begin our section measurement and investigation. After finishing the fieldwork, we give out the case explanation to seismic profile integrating with the comprehensive analysis of the geomorphological and quaternary survey along coast and in the sea. After checking and adjusting the drilling data in Shenzhen bay in several times, the whole profile was input to computer with the methods of manual collecting. The software we used is ARC/INFO. We got the spatial distribution of submarine stratification and all kinds of data through calculation. This paper will give emphasis on the application of new technology to the geomorphological and quaternary research within small region.