Abstract: Content Delivery Network (CDN) detection processing and scheduling methods, corresponding devices and nodes thereof are disclosed. The detection processing device issues one or more IP addresses in a first IP segment to a plurality of CDN nodes, receives link detection results reported by the plurality of CDN nodes, the link detection results comprising the information of time delay for accessing the IP addresses by the CDN nodes, and selects, from the plurality of CDN nodes, a priority scheduling node of the first IP segment according to the time delay information. The scheduling node searches for the priority scheduling node of the first IP segment according to the information of the first IP segment, and provides the information of the identified priority scheduling node to the user terminal.