P PT. Biro Klasifikasi Indonesia (Persero) is the only part of National Classification which being ordered by Indonesian Government to classify freight ship with Indonesian Flag and foreign flagged ship that are regularly operating in the waters zone of Indonesia.BKI also conducts research and development in the scheme of anuality improvement and technical standards which being published to the important departments with ship classification service. This can be aimed through the beneficial taking process of information technology improvement optimally. Nowadays, PT. BKI (Persero) has been advantaged IT as one of the facility to improve the performance in fulfiling readiness of bussiness information and boosting classification service in Indoirsia. The main problem located in the development IS/IT in PT. BKI (Persero) which has not been done in a well-planned way as for according to the IS/IT strategy plan ling documents, until its not suitable with visio ), mision, purpose and organizatir n's strategy. For making that kind of masterplan, required exact methodology which fit the strategy planning of PT. BKI (Persero) in boosting the classification service in Indonesia. The composition in this research will discuss about the IS/IT Strategy Planning that support organization of PT. BKI (Persero) in optimalizing the whole posessed IS/IT potential until it commensurate with PT. BKI Persero's strategy planning. These in the end will push PT. BKI (Persero) in raising productivity of public service which hook with the matter of the acceleration in the service of Indonesia Classification Service.