The invention discloses a homologous cross-screen data sniffing method. The homologous cross-screen data sniffing method comprises the following steps: screening multiple data streams according to a preset screening condition, wherein the homologous cross-screen multiple data streams comprise smart TV data, Internet data, intelligent home data, mobile device data and PC device data; introducing the screened data and environment parameters into an intelligent learning engine, wherein the environment parameters comprises a system environment parameter, a device environment parameter and a network environment parameter; and learning the fused data by the intelligent learning engine, selecting a corresponding telescopic channel and a sniffing mode type to generate a telescopic channel sniffing mode, wherein the telescopic channel sniffing mode comprises telescopic annular data sniffing, telescopic queue data sniffing and telescopic stack data sniffing. The homologous cross-screen data sniffing method disclosed by the invention is used for capturing, analyzing and processing homologous cross-screen data.