Abstract: Based on a sample questionnaire of science and technology personnel at the universities, research institutions and enterprises R&D institutions, it is found that the main influencing factors of researchers going abroad are high level of science and technology, regulation of scientific research management and good working and living conditions. We also found the main influencing factors of researchers going home are the influence of family, better career development and loving motherland. Our questionnaire results indicated that the main problems of the introduction of world-class top talent are the bad air environment, high house prices in big cities and nonstandard in scientific management; The main obstacles of the enterprises to attract international talent are the distrust development prospect and instable comparing with universities and institutions; The main problems of overseas visiting scholars program are the lacking of clear research goals and effective monitoring and evaluation mechanism. According to the questionnaire results, related policy suggestions on the Chinese researchers international flow are raised in the end.