Uncultured microorganisms are the species which have not been cultured under laboratory conditions. Most(almost 99%)of microorganisms distributing in natural environment are uncultivable.These microorganisms will become tremendous biologic resource because of their diversity on species, metabolic paths, biochemical reactions and productions. Therefore the microorganisms and especially uncultured microorganisms should be studied thoroughly, because they are important and necessary for researching microbiology theories and utilizing uncultured microbial resources.