The invention discloses a method for determining similarity of query conditions, an object query method and related devices. The method for determining similarity of query conditions comprises the steps of obtaining a query clicking log which contains querying various query conditions and correspondingly clicked objects, for each of the various query conditions, determining the count of clicking on each object correspondingly clicked under the query condition, determining the clicking vector of each query condition according to the determined count of clicking, and for every two query conditions, satisfying a predetermined condition, of the various query conditions, and according to the clicking vector of a first query condition thereof and the clicking vector of a second query condition thereof, determining the similarity between the first query condition and the second query condition, wherein the component of the clicking vector is the object and the value of the component represents the condition that the object is clicked under the query condition. Due to the scheme of the method provided by the embodiment of the invention, the accuracy of determining the similarity between different query conditions is improved.