Implementation method and device for visual construction and generation of semantic query

The invention relates to a method and device for achieving visual construction and generation of semantic query, and relates to the technical field of computers.The method comprises the steps that in response to a received graph element operation instruction sent by a terminal, a query graph is constructed based on a target graph element and/or a selectable component indicated by the graph element operation instruction; the graph element operation instruction is generated by the terminal according to specified operation of a user on created graph elements and/or selectable components displayed in an interface of the terminal; the selectable component is used for providing semantic information of selectable query information for the user; according to a preset generation rule, generating a target query statement based on target query information corresponding to the graph elements contained in the query graph; outputting the target query statement to the target object; the target object is used for executing t