Abstract: In response to the current lack of independent and integrated software platforms for structural uncertainty quantification analyses in China, this paper introduces a self-developed software platform for structural uncertainty analyses. The platform introduces, for the first time, a dual-track parallel architecture combining an interactive web-based interface (SEUQ) with an open-source code package (SEUQ+), balancing pedagogical accessibility and research depth. It systematically integrates eight modules, including random variable/process/field definition, sensitivity analyses, model updating, surrogate modeling, reliability analysis, and fragility/loss/resilience assessment, which forms a complete closed framework from uncertainty source quantification through propagation analyses to risk assessment. Through modular design and visual interaction, the software aims to lower the learning barrier and to improve the analytical efficiency. Its functionality and workflow are demonstrated through two typical application cases. The development of this software provides a fundamental tool support for probabilistic analyses and for the performance-based design of structures in China and strives to build a sustainable and evolving an open-source research ecosystem.