The invention relates to a data collection method and a system based on business relation. A data collection process and the business relation are used for providing data support for more complicated network managing business analysis. The method comprises a step of being used for generating a data item queue that a plurality of to-be-collected data items belonging to the same business are put continuously and common to-be-collected data items belonging to different business are put between the data items respectively corresponding to two business, and a step of being used for finishing the data collection of the business relation by using a plurality of collection thread groups to start the data collection process and schedule in order various items put in the data item queue. The method solves the problem of non-synchronous data collection of the business relation. All the data items of the business relation are collected in a preset time period, and therefore timeliness and accuracy of the business data analysis are enhanced. At the same time, collection time of data without business relation is discretized, and therefore concurrent stress of data collection is lowered.