Combining with the rapid changes of criminal offenses, this article indicates that traditional investigative mode has not adapted to struggles and advances that to start a new prospect of criminal investigation work, we must change old investigative mode and establish new modern investigative mode dominated by criminal information.

Investigation on line means the investigative methods based on Internet and associated criminal information.

The criminal information awareness is the display of social awareness in criminal information work.

The computerization of social information has provided convenience for human beings, meanwhile, people are deeply puzzled by information crime that network has brought about.

The typological study of information crime as a new type of crime has information society as its background of study and the informational characteristics of this type of crime show the inherent difference between highly technological crime and traditional one.

The informationization of society has become a spur to the enormous development of productive forces in human society, and it has also rapidly improved the criminal abilities of lawbreakers, especially in the field of information crime which has broadened the public security territory from real space to imaginary one and severely challenged the public security.

This investigative method renders us easy to obtain criminal information and it is of high value in investigative tactics and investigative moulds.

Criminal information in spots means various evi de nce of traces that suspects leaved at the crime scene and rational cognition gai ned from the change of the objects in the spots by the investigators.