1. A method for associating an object instance label, comprising: creating by a managed device, an object instance; assigning by the managed device, an object instance number to the object instance; receiving by the managed device, a message sent from a managing device within a managed network, wherein the message is for associating an object instance label, and the message comprises the object instance number and a corresponding label; and associating by the managed device the label with the object instance number according to the message, wherein the label is used to identify the object instance in the managed network.