The invention discloses a data recovery method and system. The data recovery method comprises the following steps: generating data processing logs; performing classification preprocessing on the data processing logs so as to obtain pre-processed data, wherein data structures or sentences in the pre-processed data can be used for recovering data directly; confirming data to be recovered according to the pre-processed data, and recovering the data to be recovered. According to the embodiment of the invention, the data processing logs are subjected to classification preprocessing, so that the data structures or the sentences in the pre-processed data can be used for recovering the data directly, in addition, the data to be recovered can be confirmed according to the pre-processed data, and as the data to be recovered are positioned in the pre-processed data, that is, the data structures or the sentences in the pre-processed data can be used for recovering the data directly, the purpose of rapidly recovering the data can be achieved.