Data dynamic collection method, device and system oriented to active security

The invention discloses a data dynamic collection method oriented to active security. The method comprises the following steps: configuring initial collection frequency of original data; acquiring theoriginal data of the current period from a monitored target according to the initial collection frequency; processing the original data to obtain the processed data; outputting the processed data toa directed target; recording the change amplitude of target data; computing a first ratio of the change amplitude sum of k target data between the current moment and the m time before the current timeto the data size; computing the change amplitude sum of p target data between the current moment and the n time before the current moment to the data size; comparing the first ratio with the second ratio; judging whether needs to adjust the initial collection frequency according to the comparison result. The invention further discloses a data dynamic collection device and collection system oriented to active security. The