This paper attempts to introduce a method for the kinematicanalysis of spatial mechanisms.In this method the elements of mo-tion grous serves as motion operators.Using these motion operators,a point is transformed along the kinematic scheme of mechanism orits vector diagrams of velocity and acceleration.Then we obtain thetransforming equations which give the solutions of kinematic parameters of the mechanism.Although this method belongs to the gematrical method,a continuous accurate solution can be obtained by it.Two examples are given to explain the theory of the method and itsapplication. This paper attempts to introduce a method for the kinematic analysis of spatial mechanisms. This method of elements of mo-tion grous serves as motion operators. Using these motion operators, a point is transformed along the kinematic scheme of mechanism orits vector diagrams of velocity and acceleration.Then we obtain thetransformform equations which give the solutions of kinematic parameters of the mechanism.Although this method belongs to the gematrical method, a continuous accurate solution can be obtained by it.Two examples are to to explain the theory of the method and itsapplication .