Currently, OCR (optical character recognition) classifiers are generally designed for one character set (or language). On the other hand, multilingual document increases drastically due to the globalization. Therefore, designing a document processing system with multilingual capability is very important. A general scheme is presented in this paper: two OCR techniques, a system, and a language classification. For embodying the scheme, a Chinese/English mixed document processing system is implemented. Three key problems are considered: the control of the system flow, the classification of Chinese/English regions, and the segmentation of English characters. Compared with old systems presented in other papers, the module of the classification of Chinese/English regions is added in the system, and a novel approach based on the equidistance is applied to the module. To verify the effectiveness of the system, another system is implemented according to the methods presented in other papers. Experiment shows, the new system is more effective than the old system. The recognition rate increases from 98.48% to 99.13% on magazine samples and from 98.68% to 99.25% on book samples, respectively.