An annotation method, a method of relation extraction, a non-transient computer storage medium, and a computing device are provided. The annotation method includes: traversing each sentence in a text to be annotated to generate a first template and selecting the first template; traversing each sentence in the text to be annotated, based on the selected first template, to match at least one new seed; evaluating the at least one new seed having been matched; repeating the above steps until a selected condition is met, and outputting the matched correct seed and a classification relationship between a first entity and a second entity in the matched correct seed.