The invention provides an opportunity network realization method in low delay. The opportunity network comprises mobile nodes, each mobile node is configured with Y interface, and the Y is positive integer greater than 1; each interface is uniquely identified by an interface ID k, the value of the k is 1-X, and the interface with the interface ID as k is abbreviated as the interface k; each interface supports one protocol, and each interface of the mobile node is connected with an interface link supporting the same protocol of the neighbor mobile node; and the interface with the best performance is set as a default interface by each mobile node. The network can fast acquire the data through the realization method provided by the invention, thereby shortening the routing delay, reducing thedata packet loss rate, and improving the quality of service. The realization method provided by the invention can be applied to the road condition monitoring, environment monitoring and like fields,and has extensive application prospect.