An equipment diagnosis device comprising: instrument means for measuring a plurality of instrumentation amounts for equipment sucking and discharging a fluid; arithmetic means for performing an arithmetic operation on the correlation between the plurality of instrumentation amounts that are measured; and normal state quantity storage means for storing state quantities including at least the correlation between said plurality of instrumentation amounts as the state quantities in the normal condition of said equipment, the state quantities being arithmetic values such as a mean value obtained from the instrumentation amounts measured when the operation is judged to be normal; wherein the state quantities of an abnormal condition are obtained by making an arithmetic operation from the state quantities of the normal condition stored in said normal state quantity storage means, characterized in that the instrumentation amounts measured during the operation of said equipment are physical quantities of the fluid and quantities of electricity for driving said equipment driving means, or the quantities of electricity occurring from said equipment during the operation of said equipment, in which the quantities of electricity occurring during the operation of said equipment include an electromagnetic force, an electric wave, a leakage current and a shaft voltage, and in that it further comprises judgement means judging whether or not said equipment is in the normal operating condition based on whether or not the state quantities in the current operating condition lie within a range of threshold indicating the normality or out of a range of threshold indicating the state quantities of the abnormal condition, and infers a failure time of said equipment from the relationship between the state quantities of the current operating condition and the threshold. instrument means for measuring a plurality of instrumentation amounts for equipment sucking and discharging a fluid; arithmetic means for performing an arithmetic operation on the correlation between the plurality of instrumentation amounts that are measured; and normal state quantity storage means for storing state quantities including at least the correlation between said plurality of instrumentation amounts as the state quantities in the normal condition of said equipment, the state quantities being arithmetic values such as a mean value obtained from the instrumentation amounts measured when the operation is judged to be normal; wherein the state quantities of an abnormal condition are obtained by making an arithmetic operation from the state quantities of the normal condition stored in said normal state quantity storage means, characterized in that the instrumentation amounts measured during the operation of said equipment are physical quantities of the fluid and quantities of electricity for driving said equipment driving means, or the quantities of electricity occurring from said equipment during the operation of said equipment, in which the quantities of electricity occurring during the operation of said equipment include an electromagnetic force, an electric wave, a leakage current and a shaft voltage, and in that it further comprises judgement means judging whether or not said equipment is in the normal operating condition based on whether or not the state quantities in the current operating condition lie within a range of threshold indicating the normality or out of a range of threshold indicating the state quantities of the abnormal condition, and infers a failure time of said equipment from the relationship between the state quantities of the current operating condition and the threshold.