In this paper the analytic mode method and numerical mode method for full wave analysis of electromagnetic scattering in cylindrically layered media are discussed. The former is applicable to field analysis under any kind of excitation; and the latter can be used to solve the field in 2-D inhomogenious media efficiently by using the concepts of reflection matrix and transmisioti matrix. Based on the numerical mode matching theory the computer aid analysis code has been given. The computation results are obtained in excellent agreement with the data from two-dimension finite element method （FEM） and the computer time is only one percent of the time of FEM.