The utility model discloses an anti -electricity -stealing device of collecting evidence based on electric energy measurementdata is unusual, gather treater, electric quantity collection device and secondary electric quantity collection device including power supply circuit, abnormal condition, one time the electric quantity collection device is used for gathering in real time the electric quantity one time to an electric quantity to gathering transmits gathers the treater for abnormal condition, secondary electric quantity collection device is used for gathering in real time the secondary electric quantity to the secondary electric quantity that to gather transmits gathers the treater for abnormal condition, abnormal condition gathers the treater and is used for the error between electricquantity of assay and secondary electric quantity, if the error in certain extent between electric quantity and the secondary electric quantity explain and do not have the electricity of stealing inthis circuit this moment, if the error between electric quantity and the secondary electric quantity exceeds the certain limit, explains at this moment in here circuit now surreptitiously. It can unpack be stolen electricity, strong magnetism to the batch meter and steal electricity, high frequency high power and disturb and steal that electricity etc. Is various to be stolen electric technological means and can both steal electric alarm detecting, just can guarantee the validity of collecting evidence.