Country's criminal procedure differs from that of the United States, as long as our country and the process of the investigation also shows the difference between the United States and the largest. Rather, the parties adopted a liberal litigation structure significantly when compared with trial procedures, our investigation procedures and investigation procedures in the United States than in the hearing procedures will be looked bigger difference.In the conventional procedure, our investigation on whether the introduction of a grand jury hearing the discussion, rather than the procedures discussed in the introduction of the jury were not weak, dont have a grand jury investigation procedure process excellence as the only country mainly discussed in the introduction of the target is shown to be. However, the grand jury process in our country in the United States for the discussion of the introduction of the discussion surrounding the grand jury process is considered to be reference enough.First, check the permissions on the prosecution to introduce a grand jury to consider as a means of control, if the grand jury system in force in the United States that is expected to serve as sufficient as a means of controlling whether the need for prior review will be thorough. More typical form as a grand jury indicted the validity of the procedure for the control device does not have the reflection is dominant in the United States, based on the discussion of procedural reforms will have to be considered that is in full swing.On the one hand, the country is on the investigation procedures and summon witnesses testified about the force, the force as a means of submitting evidence to a grand jury when considering introducing a whole grand jury process and the need for a separate means of this force must have sufficient consideration for the will. Department of Justice's recent reference is in the process of criminal procedure law revised job system or misrepresentation of sin, punishment pros and cons of the debate in a tense confrontation that could not be reflected in amendments to the end, as the country still in investigation procedures stated obligations to third parties investigation procedures and the imposition of penalties for false statements made in a social consensus in the not-matured enough points will be given.Structure coupled with a criminal defense investigation, when viewed in the context of the whole, a jury in a criminal case thoroughly and chamsimje citizen participation as a means to materialize after a means of citizen participation in the process of investigation is likely to be discussed, but the parties are public attention Unlike the private and jeokin litigation structure, one-sided, and the characteristics ex-liberal nested grand jury procedure, in the course of trial, as a matter of civic participation and the introduction of a separate in-depth review of whether the problem is believed to be.