A regional Microcomputer land Resource Evaluation Information System （MLREIS） was set up in Microcomputer （IBM-PC/XT） by using image data of Remote Sensing and field-work data of Land resources. The MLREIS could be used for evaluating land resources efficiently

rapidly and periodically

and mapping automatically. The method of grids was adopted in the system to encode feature values of polygon figures and to input them with digi-tigation. On the basis of principle and methods of Fuzzy mathematics

the author built a Fuzzy dynamical clustering model of suitability evaluation of land resources

and presented a Fuzzy pattern recognition model to appraise the quality of land resources. In the light of the above appreciation models

the logical image operations among multiplayer digital pictures were carried out in the MLREIS and thus the process automation of land resource evaluation was realised.