The embodiment of the invention provides a data security checking method and system. The data security checking method includes the steps that a data security collection module calls adaptive resourcecollection data in a collection terminal, and dependable authentication is conducted on the collection terminal; when the dependable authentication of the collection terminal is successful, the collected data is sent to a data preprocessing module; the data preprocessing module normalizes the received to-be-checked data, and conducts classification and then secure storage on the normalized data;a data security checking module calls a security checking submodule matched with a preset checking mode, and according to the called security checking submodule, security checking is conducted on theto-be-checked data to obtain a security checking result. By means of the data security checking scheme, the application patterns are diversified, and application needs of data security checking undercomplex business scenarios can be met.