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Design principles were investigated from a view of synergetics and meta rules for mechanical design and analyses were generated by introducing order parameters. Same order parameters can be used to produce different mechanisms according to specific behavior specification, and an order parameter can be used repetitively to produce the profile of a mechanism. The concept of design robots (D-Robots) was proposed to execute the repetitive operation of order parameters. Order parameters were used as action rules of D-Robots. By introducing the concept of order parameters, the process of synthesis and analysis of different mechanisms can be described in same order parameters. By introducing the concept of D-Robots, the synthesis and analysis procedure can be formulated as a generic template. Combining order parameters and D-Robots, the synthesis and analysis of mechanisms are automated. The order parameters and D-Robots were tested by mechanism synthesis and analysis. A D-Robot template for the mechanism synthesis and analysis is constructed. As case study, a D-Robot for cam mechanism design and analysis was developed and programmed. The output of the D-Robot includes generating the cam profile, kinematic analyses, the cam center and area, the bill of material, the balance weight, the speed fluctuation calculation, an animation and a report. This paper distinguishes with current research methods in generalizing meta rules to produce structures based on behavior specification rather than doing this by establishing equations for each type of mechanisms.