The invention provides a multi-parameter adjustable transcranial current stimulation system. The system comprises seven mutually connected parts: namely a main circuit, a conductive electrode, a micro-control unit, an AD module, a WIFI module, a display screen, and a mobile terminal application program. The main circuit comprises a power supply part, a voltage-regulating circuit and a frequency-modulating circuit, wherein the power supply part, the voltage-regulating circuit and the frequency-modulating circuit are connected with one another. According to the technical scheme of the invention, the stimulation system can realize the selection among three current stimulation modes, namely the tDCS mode, the tACS mode and the tRNS mode. In the tDCS current stimulation mode, the current amplitude can be adjusted within the range of 1mA-10mA. In the tACS current stimulation mode, the current amplitude can be adjusted within the range of 1mA-10Ma and the current frequency can be adjusted within the range of 1KHz-2KHz. In the tRNS current stimulation mode, the selection among different noise types, including low frequency, medium frequency, high frequency, white noise and the like, is realized. Meanwhile, users can monitor stimulation parameters and search the stimulation history according to needs by a mobile terminal.