The invention relates to a data analysis system which comprises a tracking unit and an analysis unit. The tracking unit is used for acquiring operation time of an operation record corresponding to a client. The analysis unit is used for carrying out calculation according to a time interval between the operation time of the operation record and calculation time to obtain a first value corresponding to the client. The invention further provides a data analysis method. According to the data analysis system and method disclosed by the invention, by analyzing the operation record corresponding to the client, the client is analyzed, so that before data analysis, unnecessary noise is filtered, which is beneficial for improving accuracy of an analysis result to a certain degree.