Abstract: Methods for development of computer application in plant protection were reviewed and some conditions on software development were put forward. They were: (1) the guidance of the theory of software technology, and selecting an appropriate modeling methods, such as Rapid Prototyping Model; (2) according the developing trend of computer technology, selecting popular platform for developing software, just like Windows95/98; (3) selecting the tools (such as VB, Delphi) adapted to plant protector; and (4) organizing the team of developers including producers, researchers, and teachers & students in plant protection.In this paper, this principle was also demonstrated by the example of development of Cereal Aphids Information Management and Prediction System in Huanghuaihai Region (HH-AphidGIS).