The importance of production data to the successful implementation of MES system was summarized, and the data collection system was defined as an indispensable part of the MES system. According to the  implementation experience of data collection system in discrete forging company and analyzing the characteristics of process, the production data were divided. Combining with the characteristics of overall layout and distribution of discrete forging company workshop, the industrial ethernet was applied to cover the entire workshop so as to realize the wireless network transmission of all kinds of data. According to the requirements of data structure and communication protocol, the production data collection system based on multiple collection methods was proposed. Based on the above research and analysis, the data collecting system was proposed for data collected enterprises with different equipments and different data types to achieve realtime collection of production data.