The embodiment of the invention provides a DNS resolution time delay acquisition method and device. The method comprises the following steps: receiving a domain name resolution instruction of a user,and responding to the domain name resolution instruction; obtaining a to-be-collected target domain name and a DNS server identifier, calling the dig command by taking the target domain name to be acquired and the DNS server identifier as parameters of the dig command respectively to obtain a response result, and when the response result conforms to a preset format, taking a time result in the response result as DNS resolution time delay, the DNS analysis time delay representing the time from initiating domain name analysis by the DNS server to finding an authoritative server capable of providing the target domain name information source IP to be acquired. The probe server simulates a user to surf the Internet; the DNS analysis process of surfing the Internet of the user is recorded, the time from domain name analysis initiated by the DNS server to finding of the authoritative server capable of providing the IP of the target domain name information source to be acquired is taken as theDNS analysis time delay for acquisition, the interference of an access network and part of metropolitan area networks can be eliminated, and the DNS analysis time delay acquisition error is reduced.