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IEA Coal Research surveys effects of coal properties on power generation facilities using power fuel. Coal specifications sometimes include trace amounts of element and macerals as well as calorific value, ash content, and moisture. Based on measured values obtained from industrial analysis, element analysis, ash analysis, etc., a lot of experienced indexes are used. As for coal handling and storage, oxidability, dustiness, flow property and others are expressed in experienced relational equations, but there are a lot of uncertainties in conditions. As to combustion, it is unable to accurately predict shapes of the flame, stability and burn-off of char from data on coal maceral, and it is found that correlation equations on slagging, fouling, erosion and corrosion are unsufficing. As to the whole cost, considered are effects of ash characteristics and sulfur content, and an effect of coal properties on the maintenance cost, but it is hard to predict these.