With the new understanding of oil and gas geological theories and the rapid development of modern science and technology, oil and gas geochemical exploration technique has also gained active advance in the aspects of basic theory and application extent. The achievements and understanding acquired in basic theoretical study of oil and gas geochemical exploration, method application, oil and gas geochemical analysis and data processing demonstrate that oil and gas geochemical exploration is effective and reliable, and has relatively strong adaptability and great development potential. In combination with the understanding gained in researches on oil and gas geochemical technique as well as related information, the authors hold that the application of this technique to more extensive and complex oil and gas exploration field has raised more harsh and higher requirements for oil and gas geochemical exploration technique. Aimed at tackling different exploration objects and complex conditions, oil and gas geochemical exploration technique itself should have necessary preparation and storage. In addition, integration, insitu investigation and visualization should be implemented in the whole process of oil and gas geochemical exploration.