Abstract: In the information age, internet and database technologies are developed rapidly, while the development of geotechnical investigation is lagging far behind the times because the field data is still being recorded by paper and pen. In this article, Geotechnical Investigation Field Data Collection System was designed and developed in Java language based on deep analysis of work flow and characteristics of field operation. C/S and B/S framework were adopted in this system, all of the filed data of stratum, in-situ test, sampling and underground water, can be recorded and transferred in real time on the client side, and much work can be finished on the server side, such as task creation and dispatch, record generation, soil layer classification, data output and so on. By using the collection system, data input can be simplified, numerical data about investigation can be output directly, the big database about investigation can be created and more application can be developed easily. It is hoped that this article may provide beneficial reference for drilling informatization by primary exploration and research of the geotechnical investigation collection system.