The introduction of multi-methods of Geo-logging at wellsite has become the major measurement of oil & gas exploration. From the early stage of manually geo-logging to the modern mudlogging with new techonlogies of MWD, LWD and QFT etc. The new technologies have played very important roles in the exploring of oil & gas. Being one of the newest technology of mudlogging, QFT has been widely used in oilfield for about 3 years. When it is put in operation in some oilfields of China in 1997, its advantages in oil & gas detection at wellsite have been continuously recognized,especially in the detection of shows of light oil and condensed oil. A set of powerful classification standard of resource rock oil bearing grades and the interpretation standards have been summarized by the application of the quantitative fluorescencelogging techniques (QFT) in Basins of China, together with gas-logging data, and other information got from the Geo-logging procedures at wellsite. The introduction of multi-methods of Geo-logging at wellsite has become the major stage of man geo-logging to the modern mudlogging with new techonlogies of MWD, LWD and QFT etc. The new technologies have one very important roles in the exploring of oil & gas. Being one of the newest technology of mudlogging, QFT has been widely used in oilfield for about 3 years. When it is put in operation in some oilfields of China in 1997, its advantages in oil & gas detection at wellsite have been continuously recognized, especially in the detection of shows light oil and condensed oil. A set of powerful classification standard of resource rock oil bearing grades and the interpretation standards have been already summarized by the application of the quantitative fluorescence logging techniques (QFT) in Basins of China, together with gas-logging data, and other information got from the Geo-logging procedures at wellsite.