The stable ion type cold cathode fluorescent lamp lighting system has one radial DC electric field formed inside cold cathode fluorescent lamp tube, so that free electrons inside the lamp tube may be accelerated to collide with gas atom frequently to produce enough energy to free the gas electrons, and the free Hg ions and Ar ions acted by the radial DC electric field have radial speed become zero while reaching the fluorescent coating to avoid collision to the fluorescent coating, the generation of non-crystal fluorescent layer and the embedding of Hg ion into the fluorescent coating. One axial reverse equivalent DC electric field is formed to avoid accumulation of Hg in the electrode to prolong the service life of the lamp tube and the fluorescent coating. In addition, the lamp tube has brightness further raised by the excessive energy the radial DC electric field provides.