Abstract: As an exploratory teaching mode based on practical experience，case teaching method has become an important way to train high-level applied talents worldwide.Case library was designed for the postgraduate course“Intelligent Control and Realization Using Matlab”majoring in agricultural mechanization.Firstly，existing problems in case teaching were analyzed，goal of case library design was clarified，and then case design and implementation process were introduced in detail using“automatic harvesting machine for silkworm mounting cocoon frame based on cartesian coordinates”as an example.Case library teaching applies cutting-edge theory of classroom knowledge and intelligent control to engineering practice，making case teaching more efficient and systematic.