Establishing the attorney s right of investigation and obtaining evidednce during the investigation and prosecution stage is favorable to realize the justice of criminal lawsuit in substance and procedure and in our country there is no related legislation which always causes conflicts between attorneys and investigation organs.

In practice,related authorities generally forbid defendant lawyers from investigating other detainees except the interested parties,which leads to that defendant lawyers\' right of investigation is defeated.

The systems for investigation and evidence collection in German courts realize the dual lawsuit goal——maintaining the court authority and safeguarding lawsuit right.

In the present practice of investigation and evidence collection against events related to people appealing for help in groups, public security organs face quite a lot of problems as to legal basis, awareness, object, emphasis, approaches, timing, and methods of evidence collection.

Investigation and evidence collection given for counsel is absolutely the rule of law needs of the community, but also to promote social progress and an important part of its necessity is obvious.

The Investigation of Criminal Cases about Business Secret;

The author inquires into studies and the problems of investigation when the People s Procuratorate examines the civil cases.

The guarantee of lawyers right to investigate and obtain evidence is one of the contents of Code of Criminal Procedure of China, and it is important to promote judicial justice.