With the rapid development of science and technology, the application of relevant
science and technology in the process of criminal proceedings will give birth to different kinds of
evidence materials, and then impact the current evidence system. Evidence for criminal science
and technology should be from two dimensions of criminal law and the science and technology
to carry on the organic integration, criminal science and technology, the evidence is in the
process of criminal procedure, used with regularity, relative stability, simplicity of the system of
knowledge and cognition method and spawned by the relevant knowledge of tools, to pursue
and realize the case and entity justice and procedure justice have found evidence to prove the
fact of the case material. Its theoretical system includes not only philosophy and social sciences,
but also natural and social sciences for the evidence of criminal science and technology, forming
the “pyramid structure” of “philosophy-science and technology-criminal law and evidence law”,
and criminal law and evidence law are at the top of the pyramid. At the same time, should with
“demand-purpose”, “probability-logic”, “experience-science”, “reliability-validity” as the analysis
framework. In the application of criminal science and technology evidence, we should construct
the interactive mechanism of expert’s “relative dimension reduction” and judge’s “relative
dimension increase”, the validity standard of criminal science and technology evidence and the
related system of criminal science and technology evidence.