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Study on the electron transport coefficient in mixtures of CF4 and Ar, have been analyzed over a range ofthe reduced electric field strength between 0.1 and 350[Td] by the two-term approximation of the Boltzmann equation (BEq.) method and the Monte Carlo simulation (MCS). The calculations of electron swarm parameters require the knowledge of several collision cross-sections of electron beam. Thus, published momentum transfer, ionization, vibration, attachment, electronic excitation, and disociation cross-sections of electrons for CF4 and Ar, were used. The differences of the transport coefficients of electrons in CF4 mixtures of Ar, have been explained by the deduced energy distribution for electrons and the complete collision cross-sections for electrons.The results of the Boltzmann equation and the Monte Carlo simulation have been compared with the data presented by several workers. The deduced transport coefficients for electrons agree reasonably well with the experimental and simulation data obtained by Nakamura and Hayashi. The energy distribution function of electrons in CF4-Ar mixtures shows the Maxwellian distribution for energy. That is, f(ε) has the symmetrical shape whose axis of symmetry is a most probably energy.The proposed theoretical simulation techniques in this work will be useful to predict the fundamental proces of charged particles and the breakdown properties of gas mixtures.A two-term approximation of the Boltzmann equation analysis and Monte Carlo simulation have been used to study transport coefficients.