The aim of our research was to develop a dairy farm technology planning system which models the material flow and value chain of a sample dairy farm. By this model, widespread sensitivity analyses can be made to promote an economically and professionally more sound decision-making by modifying the main parameters that has an effect on the system. Risk analysis might also be made if stochastic simulation is used and some parameters of the technology planning system are managed as probability variables. The most important risk factors' effect were analyzed on the result and costs. The elaborated technology planning system has new elements compared to other decision-support systems on the market, which is suitable for soundly preparing and supporting decisions and analyzing the risk of dairy farms. The system can be used in an efficient way to model dairy farms with herd from 100 to 1500 cows, to determine risk factors and to even provide controlling tasks.