The invention discloses a space-oriented multifunctional vertical integration device. According to the functional requirements of single-space equipment, the original functions of a process layer merging unit and an intelligent terminal and the functions of space layer protection and measurement and control are integrated into one device. The merging unit, the intelligent terminal and protection measurement and control are realized by independent CPUs, including a merging unit CPU, an intelligent terminal CPU and a protection measurement and control metering CPU. A multi-CPU board card is adopted, the damage of any CPU does not affect the realization of the functions of the other CPUs, relative independence of multiple functions is ensured, and the reliability of equipment is improved. The CPUs communicate via a bus, and the link of transmission from process layer equipment to space layer equipment is compressed. Transmission of external data is converted into sharing of internal information of the device. The quickness and reliability of protection are enhanced.