Classification analysis is a well-studied technique in data mining and machine learning domains. Due to the forecasting characteristic of classification, it has been used in a lot of real applications. This study will build and develop a practical Cloud Data Mining Decision Platform, MCU Smart Score II, which meets the requirement of the enterprises. The experimental results show that MCU Smart Score II outperforms the current on-line classification system, ismartscore, and Microsoft Cloud Data Mining system in classification evaluation. Besides, it is also better than the traditional data mining classification systems.