The invention discloses a data calling method, device, equipment and system. The method comprises the steps of determining a data calling process formed based on at least one service calling relationship; judging whether the service in the at least one service calling relationship is associated with a target debugging version or not, wherein the target debugging version is a special case for a basic function version of the service; and determining a service route in the at least one service calling relationship according to a judgment result. By means of the technical scheme, whether the service needing to be called is associated with the target debugging version or not is judged in advance, the version of the current service needing to be called can be determined, the specific version routed to the service is determined according to the judgment result, and then the problem of calling errors is solved.