Integrated water purification system and water purification process

The invention relates to an integrated water purification system and a water purification process, the water purification system comprises a pretreatment device, a first multi-medium filter, a second multi-medium filter and an active carbon filter, and the first multi-medium filter and the second multi-medium filter are sequentially connected, and the water purification system further comprises a living water storage assembly and a drinking water storage assembly. The pretreatment device is used for adding a flocculating agent and a sterilizing agent into inlet water of the first multi-medium filter, multiple layers of filtering media are respectively arranged in the first multi-medium filter and the second multi-medium filter, and the average particle sizes of the multiple layers of filtering media are sequentially increased from top to bottom. When the heights are the same, the average particle size of the filtering medium in the first multi-medium filter is greater than that of the second multi-medium filt