The invention discloses an SQL execution method and device. Through the SQL execution method and device, the problems that product learning difficulty is high, development, operation and maintenance and project management difficulty is high, and cost is high due to inconsistent SQL support standards in the prior art can be solved, and unified development of different SQL-type distributed memory databases is realized. The method comprises the steps that a service SQL request submitted by a client is acquired, wherein the service SQL request contains a to-be-processed SQL; a trained classifier is utilized to classify the to-be-processed SQL, if the to-be-processed SQL does not belong to a pre-divided SQL type, the to-be-processed SQL is preprocessed, and a standard SQL is obtained; the standard SQL is submitted to a corresponding SQL-type distributed memory database for execution; and after execution in the SQL-type distributed memory database is completed, an execution result is acquired and fed back to the client, wherein the pre-divided SQL type comprises an SQL type with a minimum SQL standard jointly supported by all the SQL-type distributed memory databases.