The invention relates to a method for monitoring an electric device in real time and particularly relates to a method for monitoring a health state of an electric information collection device in realtime. The method provided by the invention aims at the problem that in the prior art, the efficiency is very low, the hardware resource consumption is serious and the data demand timeliness cannot besatisfied when circular traversal is carried out on each numerical value. A method of carrying out matching application of lag and lead functions in an oracle database and extracting related data isadopted; according to the algorithm, the circular traversal does not need to be carried out on the numerical values; a difference value is calculated in an offset mode; whether the numerical values are continuous is judged; the data analysis efficiency is greatly improved; an analysis result is calculated; the time is effectively reduced; the efficiency is improved; and the hardware loss is reduced.