6. An apparatus for pushing information, comprising: a query candidate set obtaining module, configured to: pre-process historical queries on webpages, to obtain a query candidate set; an obtaining module, configured to obtain a specified query input on a webpage; a matching module, configured to match the specified query with queries in the query candidate set, the queries in the query candidate set being queries implying a picture; and a picture outputting module, configured to output a corresponding picture on the webpage according to the specified query when there is a query in the query candidate set matching the specified query; wherein the query candidate set obtaining module comprises: a first filtering unit, configured to filter the historical queries on the webpages according to the numbers of times that the historical queries are input for searching, to obtain a first candidate query set, wherein the number of times that each query in the first candidate query set is input for searching is greater than a first threshold; a second filtering unit, configured to obtain a related score of each query in the first candidate query set, and filter queries in the first candidate query set according to the related score of each query in the first candidate query set, to obtain a second candidate query set; a picture implying score obtaining unit, configured to obtain the number of preset keywords comprised in each query in the second candidate query set, and obtain a picture implying score of each query in the second candidate query set according to a related score of each query in the second candidate query set and the number of preset keywords comprised in each query in the second candidate query set; and a query candidate set obtaining unit, configured to add a query, in the second candidate query set, whose picture implying score is greater than a second threshold to the query candidate set; wherein the picture implying score obtaining unit is configured to: set a picture implying score of a query in the second candidate query as zero when both a related score of the query and the number of preset keywords comprised in the query are equal to zero; set a picture implying score of a query in the second candidate query set as a seventh threshold when a related score of the query is equal to zero and the number of preset keywords comprised in the query is greater than zero; set the number of preset keywords comprised in a query in the second candidate query set as an eighth threshold when both a related score of the query and the number of preset keywords comprised in the query are greater than zero, and obtain a picture implying score of the query according to a following formula: the ⁢ ⁢ picture ⁢ ⁢ implying ⁢ ⁢ score ⁢ ⁢ of ⁢ ⁢ the ⁢ ⁢ query = 2 × the ⁢ ⁢ eighth ⁢ ⁢ threshold × the ⁢ ⁢ related ⁢ ⁢ score ⁢ ⁢ of ⁢ ⁢ the ⁢ ⁢ query a ⁢ ⁢ length ⁢ ⁢ of ⁢ ⁢ the ⁢ ⁢ character ⁢ ⁢ string ⁢ ⁢ of ⁢ ⁢ the ⁢ ⁢ query ; and set the number of preset keywords comprised in a query in the second candidate query set to a ninth threshold when a related score of the query is greater than zero and the number of preset keywords comprised in the query is equal to zero, and obtain a picture implying score of the query according to 2*the ninth threshold*the related score of the query/a length of the query.
6. An apparatus for pushing information, comprising: a query candidate set obtaining module, configured to: pre-process historical queries on webpages, to obtain a query candidate set; an obtaining module, configured to obtain a specified query input on a webpage; a matching module, configured to match the specified query with queries in the query candidate set, the queries in the query candidate set being queries implying a picture; and a picture outputting module, configured to output a corresponding picture on the webpage according to the specified query when there is a query in the query candidate set matching the specified query; wherein the query candidate set obtaining module comprises: a first filtering unit, configured to filter the historical queries on the webpages according to the numbers of times that the historical queries are input for searching, to obtain a first candidate query set, wherein the number of times that each query in the first candidate query set is input for searching is greater than a first threshold; a second filtering unit, configured to obtain a related score of each query in the first candidate query set, and filter queries in the first candidate query set according to the related score of each query in the first candidate query set, to obtain a second candidate query set; a picture implying score obtaining unit, configured to obtain the number of preset keywords comprised in each query in the second candidate query set, and obtain a picture implying score of each query in the second candidate query set according to a related score of each query in the second candidate query set and the number of preset keywords comprised in each query in the second candidate query set; and a query candidate set obtaining unit, configured to add a query, in the second candidate query set, whose picture implying score is greater than a second threshold to the query candidate set; wherein the picture implying score obtaining unit is configured to: set a picture implying score of a query in the second candidate query as zero when both a related score of the query and the number of preset keywords comprised in the query are equal to zero; set a picture implying score of a query in the second candidate query set as a seventh threshold when a related score of the query is equal to zero and the number of preset keywords comprised in the query is greater than zero; set the number of preset keywords comprised in a query in the second candidate query set as an eighth threshold when both a related score of the query and the number of preset keywords comprised in the query are greater than zero, and obtain a picture implying score of the query according to a following formula: the ⁢ ⁢ picture ⁢ ⁢ implying ⁢ ⁢ score ⁢ ⁢ of ⁢ ⁢ the ⁢ ⁢ query = 2 × the ⁢ ⁢ eighth ⁢ ⁢ threshold × the ⁢ ⁢ related ⁢ ⁢ score ⁢ ⁢ of ⁢ ⁢ the ⁢ ⁢ query a ⁢ ⁢ length ⁢ ⁢ of ⁢ ⁢ the ⁢ ⁢ character ⁢ ⁢ string ⁢ ⁢ of ⁢ ⁢ the ⁢ ⁢ query ; and set the number of preset keywords comprised in a query in the second candidate query set to a ninth threshold when a related score of the query is greater than zero and the number of preset keywords comprised in the query is equal to zero, and obtain a picture implying score of the query according to 2*the ninth threshold*the related score of the query/a length of the query. 7. The apparatus according to claim 6 , wherein the second filtering unit comprises: an extracting subunit, configured to obtain searching results on a specified page of searching results of each query in the first candidate query set, and extract a title of each searching result; a related score calculating subunit, configured to obtain the related score of each query in the first candidate query set according to keywords comprised in each title and a location of each title, wherein if a title comprises a preset keyword and a location of the title is at or in front of a first specified location among the searching results, a third threshold is added to a related score of a query, or a fourth threshold is added to a related score of a query if a location of the title is behind the first specified location, wherein the third threshold is greater than the fourth threshold, and the related score of the query is summarized according to each searching result by starting from the first searching result on the specified page; and a filtering subunit, configured to filter the queries in the first candidate query set, discard a query if a score of the query in the first candidate query on a second specified location is less than a fifth threshold, and discard a query if the number of titles, which comprise the preset keyword, of searching results on the specified page of searching results of the query is less than a sixth threshold, to obtain the second candidate query set after the filtering.