Data smoothing method and data smoothing device

The invention provides a data smoothing method and a data smoothing device. The data smoothing method may include: acquiring ratio data for a plurality of objects in a plurality of periods, each ratio in the ratio data being a ratio of a first variable to a second variable; calculating a mean value and a variance of the ratio data based on the ratio data; determining a smoothing parameter for adjusting the first variable value and the second variable value based on the mean value and the variance; and smoothing the ratio data by using the smoothing parameter. 本公开提供一种数据平滑方法和数据平滑装置。所述数据平滑方法可包括：获取针对多个对象在多个时段中的比率数据，其中，比率数据中的每个比率是第一变量与第二变量的比值；基于比率数据计算比率数据的均值和方差；基于均值和方差确定用于调整第一变量值和第二变量值的平滑参数；利用平滑参数对比率数据进行平滑处理。