Abstract: Analysis of classic concept lattice and rough concept lattice shows that concept extension with either all the attributes or only one attribute can decrease support and confidence of the extracted association rules greatly. To solve this problem, the author put forward a new concept of lattice structure: interval concept lattice，in which the concept extension is object sets that meet the intension property in the interval. Firstly, it was proved that interval concept lattice degenerates into classic concept lattice when , interval concept lattice degenerates into rough concept lattice. Secondly, the measurement precision and coverage of interval concept lattice concepts were given and some related properties were discussed. Thirdly, some unique properties of interval concept lattice were proved. Fourthly, the construction method of interval concept lattice was preliminary provided. Finally, the necessity and practicability were verified through a case study.

Key words: Concept lattice, Rough concept lattice, Interval concept lattice, Concept precision