Quantum artificial intelligence is an emerging interdisciplinary science and technology from the crossover of the field of quantum computing and that of artificial intelligence. During the past decades, quantum computing and artificial intelligence have been through different development processes, and both now demonstrate promising application perspectives that may bring up transformative changes for people’s work and life. We are coming to a good timing for the deep crossover of quantum computing and artificial intelligence, and a perfect stage to embark on for the research of quantum artificial intelligence.