An estimation model creation device for estimating the grinding wheel surface state comprises a measurement data acquisition unit (120) and a first learning model creation unit (150). The measurement data maintenance unit (120) receives measurement data which are measured when grinding workpieces (W) with a grinding wheel (16) in a grinding machine (1). The measurement data maintenance unit (120) receives the measurement data for a predetermined period of time for each workpiece (W). The measurement data comprise first measurement data which indicate the state of a structural element (12, 13, 14 and 15) of the grinding machine (1) and / or second measurement data which relate to a ground section of the workpiece (W). The first learning model creation unit (150) performs machine learning by using the measurement data related to the workpieces (W) as input data for the first learning to create a first learning model for estimating a surface condition of the grinding wheel (16).
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