A method for testing Total Isotropic Sensitivity of a terminal, comprising:: placing the terminal on a rotating table in a darkroom to create a communication connection with a base station simulator via a darkroom measuring antenna;: rotating the rotating table to test a terminal received signal strength of the terminal at each Theta/Phi angle and in each antenna polarization direction, and to generate a terminal received signal strength direction map;: generating a correspondence table between base station power levels and the terminal received signal strengths; it is characterized in that, after the step, the method further comprises:: searching for the best Theta/Phi angle and the best antenna polarization direction according to the terminal received signal strength direction map, and rotating the terminal to the best Theta/Phi angle and the best antenna polarization direction to test an Effective Isotropic Sensitivity EIS best of all channels under test at the best Theta/Phi angle and in the best antenna polarization direction, wherein the best Theta/Phi angle and the best antenna polarization direction is a Theta/Phi angle and an antenna polarization direction of a testing point having a maximum terminal received signal strength in the terminal received signal strength direction map;: calculating EISs at other Theta/Phi angles and in other antenna polarization directions according to the EIS EIS best and the correspondence table: EIS = EIS best + RXLEVEL best − RXLEVEL where, RXLEVEL best is a terminal received signal strength at the best Theta/Phi angle and in the best antenna polarization direction, and RXLEVEL is the terminal received signal strength at the other Theta/Phi angles and in other antenna polarization directions; and: integrating all the EISs to obtain the terminal TIS.: placing the terminal on a rotating table in a darkroom to create a communication connection with a base station simulator via a darkroom measuring antenna;: rotating the rotating table to test a terminal received signal strength of the terminal at each Theta/Phi angle and in each antenna polarization direction, and to generate a terminal received signal strength direction map;: generating a correspondence table between base station power levels and the terminal received signal strengths; it is characterized in that, after the step, the method further comprises:: searching for the best Theta/Phi angle and the best antenna polarization direction according to the terminal received signal strength direction map, and rotating the terminal to the best Theta/Phi angle and the best antenna polarization direction to test an Effective Isotropic Sensitivity EIS best of all channels under test at the best Theta/Phi angle and in the best antenna polarization direction, wherein the best Theta/Phi angle and the best antenna polarization direction is a Theta/Phi angle and an antenna polarization direction of a testing point having a maximum terminal received signal strength in the terminal received signal strength direction map;: calculating EISs at other Theta/Phi angles and in other antenna polarization directions according to the EIS EIS best and the correspondence table: EIS = EIS best + RXLEVEL best − RXLEVEL where, RXLEVEL best is a terminal received signal strength at the best Theta/Phi angle and in the best antenna polarization direction, and RXLEVEL is the terminal received signal strength at the other Theta/Phi angles and in other antenna polarization directions; and: integrating all the EISs to obtain the terminal TIS.: searching for the best Theta/Phi angle and the best antenna polarization direction according to the terminal received signal strength direction map, and rotating the terminal to the best Theta/Phi angle and the best antenna polarization direction to test an Effective Isotropic Sensitivity EIS best of all channels under test at the best Theta/Phi angle and in the best antenna polarization direction, wherein the best Theta/Phi angle and the best antenna polarization direction is a Theta/Phi angle and an antenna polarization direction of a testing point having a maximum terminal received signal strength in the terminal received signal strength direction map;: calculating EISs at other Theta/Phi angles and in other antenna polarization directions according to the EIS EIS best and the correspondence table: EIS = EIS best + RXLEVEL best − RXLEVEL where, RXLEVEL best is a terminal received signal strength at the best Theta/Phi angle and in the best antenna polarization direction, and RXLEVEL is the terminal received signal strength at the other Theta/Phi angles and in other antenna polarization directions; and: integrating all the EISs to obtain the terminal TIS.