PROBLEM TO BE SOLVED: To provide a method for producing a novel material with highly functional capability from waste diatomaceous earth excellent in handling easiness, excellent in fuel cost for drying and capable of obtaining a high function at a low cost through utilizing a function by carrying out the remaining control of an organic component such as oxygen/enzyme in the waste diatomaceous earth or the like when the waste diatomaceous earth is disposed, and the novel material with the highly functional capability by the waste diatomaceous earth. SOLUTION: This method comprises the removal of the water content of sludgy waste diatomaceous earth by evaporation to carry out drying processing by calcined limes for the drying processing having calcined lime (including burning dolomite) as a main component, and sterilizing to make the sludgy waste diatomaceous earth harmless by alkali. This method further comprises the remaining control of the function included in an organic component such as oxygen/enzyme contained in the waste diatomaceous earth or the like by accompanying the drying processing of the sludgy waste diatomaceous earth. COPYRIGHT: (C)2007,JPO&INPIT