The invention discloses an automatic judging method of network resource types, which comprises the following steps: obtaining prefix features and suffix features of names of resources to be classified; and classifying subject contents of the resources to be classified according to the prefix features and the suffix features. The resources to be classified refer to various audio files and video files, characters, pictures, software, games, source codes, data sets, study data and the like which are propagated on Internet. The resources to be classified generally comprise self composition members, and express independent subject contents. The original organization state of the resources can be out of order and can also be classified and tidied, but the classification angles are different. The organization of the resources by a uniform classification system is the requirement for building various kinds of application such as digital libraries, Internet resource storehouses, network teaching material storehouses and the like. The invention automatically classifies the resources to be classified according to the prefix features and the suffix features of the resources to be classified, the labor is saved, and the work efficiency is improved.