One of the most important technologic issue at present in the world for DNA vaccines and gene therapy is the development of high efficient method for delivering genes into animal cells. Research and development of an apparatus that is capable of safely and efficiently delivering exogenous DNA into tissue cells is the key to overcome this problem.The application of pulsed electric field to cells using low voltage can enhance cell permeability and facilitate polynucleotide uptake into cells. The efficiency of DNA vaccines and gene therapy can be improved by this method. The characteristics of our instrument are efficient, simple, and safe compared with similar product. In addition, the price of the same apparatus made abroad is 5 folder higher. Therefor, the WJ-2000 cell electroporation apparatus is both high quality and inexpensive.