LOODS, pur forward by the author, is a new object-oriented terminal applications development environment, which consists of two parts. system modelling methodology (LOODS Abstract Models) and LOODS visual language system. The former is an object-oriented concurrent/parallel information system modelling methodology on the basis of requirements' analysis results. And the later is an automatic generator of LOODS abstract models, supporting concept programming and learning-by-examples building of application systems. Also a new method of object oriented learning is introduced to the realization of LOODS visual language system. LOODS has been realised in C++ on Novell network environment.