Expert systems are computer programs that could simulate specialist to deal with domains of narrows pecialization.Every expert system mainly consists of the knowledge base,the global data base,inferencee ngine,the explanation and interface.At present,the application styles of domestic expert systems onp omology are the pomiculture production management expert systems and the fruit tree nutrition diagnosise xpert systems,the plant diseases and insect pests'diagnosis expert systems.There are some computert echnologies on the pomological expert s...