Methods and devices of adopting knowledge graph to recommend supply/demand information

The invention provides methods and devices of adopting a knowledge graph to recommend supply/demand information. One of the above-mentioned methods includes: judging whether a general triad simultaneously containing entities of a supply/demand triad A and a supply/demand triad B exists and/or whether a general triad simultaneously containing services of the supply/demand triad A and a supply/demand triad C exists; and if yes, recommending supply/demand triples, which contain the service in the supply/demand triple C and have predicates of which meaning is opposite to that of a predicate in thesupply/demand triad C, to the entity of the supply/demand triad B. In data recommendation, likelihood relationships of elements which are not directly associated are established through supply/demandtriads, and then retrieval of whether association relationships of the above-mentioned elements exist is carried out in general triads; and in a case where the general triads have the above-mentionedassociation relationships,