When BIM technology drives the informatization progress in Chinese rail transit industry, the clients often face challenges, such as BIM adoption solutions, BIM management efficiency, BIM personnel, etc. These challenges bring problems as policy difficult-making, biding postponing or delaying, progress management inefficiency, etc. In this paper, the author studies and analyzes the existing research on this topic, raises a new informatization pattern as "Client leading+BIM general manager directing+contractors′ execution". This new pattern can support construction informatization in organization rebuild, biding policy, achievement assessment. The case study indicates that this pattern help client to achieved BIM objectives in Enterprise Codes, BIM platform development and full-scale BIM application in a short time.