Abstract: According to the condition signal’s feature, this paper proposed a hybrid data compression algorithm based on the backward scope (BS) and piecewise linear online trending (PLOT) algorithm. Within the maximum time limit, the algorithm uses BS to estimate the data stabilization, then adopts PLOT to compress the fluctuant data, considering the time attribute of data and the detection of outliers in noisy environment. This method was applied to the remote monitoring system for tower crane. The result indicates that the proposed method with antidisturbance property can improve the compression efficiency and transmission efficiency.