The invention discloses a method for assessing services, which comprises: obtaining service information which needs assessing through inquiry, encoding the service information according to an information format which comprises two parts of a message head and a message body of a binary code mode, obtaining an access request message, sending corresponding relation of the message head and the service information of the binary code mode to a service supplier in advance, sending the access request message to the service supplier which needs accessing, and obtaining services corresponding to the access request message which is provided by the service supplier. The invention provides the method for accessing services and a system thereof, which are used to improve the service access speed of the industries such as electric power and the like.