The provision of service involves both employees and customers and can be provided by humans and/or machines. Depending on the nature of service, different intelligences are required.Synthesizing from the literatures of HI and AI, we distinguish four intelligences, in the order of their developmental history in AI. They are mechanical, analytical, intuitive, and empathetic.The four intelligences may be both ordinal and parallel: They are ordinal because some HIs (e.g., intuitive and empathetic ones) are more difficult to be mimicked by AI and thus takelonger to develop successful AI applications. They may be parallel because once AI has reached a certain intelligence level, all lower AIs can coexist to provide service.For convenience, we refer to the intelligences that take AI longer to emulate as “higher” levels of intelligence.