调查取证,是通过询问当事者、知情人,考察发生问题的现场,查阅有关资料、档案等方法,了解情况,核实问题,弄清事实,取得确凿证明材料的过程.办案人员要在事先对案件线索进行深入分析研究的基础上,重点考虑怎样运用必要的调查取证技术手段,获取其真实可靠的证据材料.办案实践中,我们感到调查取证中有几个问题值得注意. Investigation and evidence collection is done by asking the parties concerned and insiders to inspect the scene of the problem, inspecting the relevant information and files, understanding the situation, verifying the problems, clarifying the facts and obtaining the evidence of the materials. On the basis of in-depth analysis and research, we will focus on how to use the necessary technical means of investigation and evidence collection to obtain its true and reliable evidence materials.In the practice of handling cases, we feel that there are several problems in the investigation and evidence collection that deserve our attention.