A fulldome theater, also known as a dome theater, is an immersive viewing venue centered on a spherical screen. Its screen usually covers the audience's overhead and surrounding field of vision. Combined with a surround sound system and specially made films, it can create an "being there" sensory experience, breaking the visual limitations of traditional flat screens. This type of theater is widely used in science and technology museums, theme parks, cultural and tourism scenic spots, and is suitable for both popular science education and entertainment experiences.

The core advantage of a fulldome theater lies in its immersive effect. The curvature of the spherical screen highly matches the human visual field range, allowing the audience to capture the complete picture without deliberately turning their heads. Combined with motion seats and special effect equipment (such as air jets and water mist), it can simulate scenes such as space travel and deep-sea exploration. Its images are shot with a fisheye lens or generated by a computer, and the pictures are projected onto the screen after distortion correction to ensure that the audience in different positions can see clear and uniform images.

Regarding the investment cost, the cost of a fulldome theater varies greatly due to factors such as screen size, equipment configuration, and venue conditions. Small popular science fulldome theaters (with a screen diameter of 8-12 meters) are a common choice, with equipment costs ranging from 200,000 to 500,000 US dollars, including LED dome screens, professional audio systems, playback servers, and special effect control systems. In terms of the venue, a column-free space with a height of no less than 5 meters needs to be reserved, and the decoration and basic renovation costs are about 50,000 to 150,000 US dollars, with the overall investment ranging from 300,000 to 600,000 US dollars.

Medium-sized entertainment fulldome theaters (with a screen diameter of 15-20 meters) are targeted at commercial cultural and tourism projects, requiring higher-brightness LED dome screens, 4D motion seats, and complex special effect systems. The equipment cost rises to 600,000 to 1 million US dollars, and the venue renovation and operation supporting costs are about 100,000 to 200,000 US dollars, with a total investment of up to 700,000 to 1 million US dollars. The investment in large-scale customized fulldome theaters (with a screen diameter of more than 20 meters) exceeds 2 million US dollars, which are mainly used in large-scale theme parks or landmark cultural and tourism projects.