The invention provides a failure domain name detection method and device, and relates to the technical field of communication, and the method comprises the steps: firstly receiving a uniform resourcelocator (URL), sent by a user, of a to-be-detected webpage, and obtaining the webpage information of the to-be-detected webpage based on the URL; wherein the webpage information comprises at least oneof an IP address, a domain name, a title, a response code and a response body; if the IP address of the domain name cannot be resolved, determining the domain name of which the IP address can be resolved and the domain name is expired as a failure domain name; and if the IP address can be resolved and the domain name is not expired, determining whether the domain name is a failed domain name based on at least one of the title, the response code and the response body. According to the invention, all failure domain names in the recorded domain name data can be discovered in time, the detectionis comprehensive, the accuracy of failure domain name detection is improved, and great convenience is brought to supervision work.