Gauss MT90 is a next-generation metal 3D printer based on Paste-based Metal Extrusion (PME) technology. Unlike powder- or welding-based systems, it removes dust, explosion risks, and high-temperature processes, making it safe for offices and laboratories. A built-in HEPA filter blocks emissions, while an LED signaling system delivers intuitive status feedback. The Quick Start mode automatically configures process parameters, enabling even first-time users to start printing within minutes. An automatic bed replacement system simplifies workflow and integrates with automation. With an AI camera-based viscosity unit, precision dispensing algorithm, and extrusion control system, MT90 ensures stable deposition for high-precision parts such as heat sinks and electronic components. By replacing high-power lasers and heating with a high-efficiency paste system, MT90 lowers energy use and carbon emissions, supporting sustainable manufacturing. Its low-noise design ensures comfortable operation, and support for SUS 316L, copper, titanium, and aluminum enables applications from prototyping to smart factory integration.