Precision fruits system is based on new tools and sources of information provided by modern technologies, such as the global positioning systems (GPS), remote sensing (RS), geographic information system (GIS) and variable-rate technologies. The modern technologies are integrated based on computer technology. The study introduced foreign and domestic situation of computer technology in precision fruits in detail. The key computer technology, such as the basic geographic databases and intelligent decision support system in precision fruits were analyzed, and the theory and practical application of spectral diagnosis of soil-leaf nutrient and online detecting model of microelement of fruits was emphasized in Suzhou city. The study shows that computer technology is one of the keys to establish high quality and efficiency, ecological, safety precision fruits farming techniques system of Suzhou city, and provides technical support for an increase in income of fruits farmer while decreasing in cost and pollution of fruits farming.