HoloDreamer is a text-driven 3D scene generation framework capable of producing immersive and view-consistent fully enclosed 3D scenes. It consists of two fundamental modules: stylized rectangular panoramic generation and enhanced two-phase panoramic reconstruction. This framework first generates high-definition panoramic images as a complete initialization for the 3D scene, then quickly reconstructs the 3D scene using 3D Gaussian scattering (3D-GS) technology, resulting in view-consistent and fully enclosed 3D scene generation. HoloDreamer's main advantages include high visual consistency, harmony, and robust reconstruction quality and rendering.