The invention provides an adaptive device facing heterogeneous storage. The adaptive device is characterized in that a uniform QL (Query Language) analyzing module is used for receiving a uniform QL sentence from a client side and analyzing the uniform QL sentence, wherein an index CRUD (Create Retrieve Update Delete) operation request can be sent to an index module when an analyzing result is the index CRUD operation request; a data conversion request can be sent to a data model module when the analyzing result is the data conversion request; a data CRUD operation request can be sent to a specific database QL module when the analyzing result is the data CRUD operation request; the specific database QL module is used for saving a corresponding relation between database identification and database type, generating an index operation QL sentence according to index keywords which are sent by the index module, an index operation order and the database identification and generating a data read QL sentence and a data storage QL sentence according to data keywords which are sent by the data model module, the database identification before conversion and the database identification after conversion.