This paper presents a systematic process for the design of hydraulic brake systems of automotives and for the one-way estimation of hot judder characteristics. The systematic process was programmed by using MATLAB, and the variation of the hot judder characteristics of disc brakes attributed to the change in the design parameters of hydraulic components can be calculated by using the same program. The brake pressure transfer process was mathematically derived. A finite element analysis model of a ventilated disc brake was created. The friction coefficient between disc and pad and the convection coefficient on the disc surface were applied as functions of temperature. The reliability of the simulation results were verified through a comparison with dynamo test results.