The multi-parameter probe is based on optical and electro-chemical principles. It is a self-contained device with cleaning brush and remote data transmission. It has a very broad water monitoring capability, which can be used for long-term monitoring of ocean, lake, river and groundwater. Measurement items include temperature, electrical conductivity, salinity, pH, depth, chlorophyll, phycocyanin, dissolved oxygen, turbidity, etc. At the same time, our sensors do not need anti-fouling system of chemical agents, but use mechanical brushes, optical coating and other methods to prevent biological adhesion, and can be operated online for 3-6 months.