[en] KAERI has developed a transport lattice calculation code KARMA (Kernel Analyzer by Ray-tracing Method for Fuel Assembly) under the project 'Development of the Major Design Codes for a Nuclear Power Plant' which is supported by Korea Ministry of Knowledge Economy. This project consists of two parts: the first part is to generate the multi-group cross section library using the library processing system developed by KAERI, and the second one is to develop a transport lattice code to generate the homogenized macro-group group constants for the following core analysis code. This paper is to report the current status, the programs, and some preliminary results of the multi-group library processing section for the KARMA code