The purpose of the article is to investigate the current state of the interior of the palace building of the Uzhhorod Castle of the Transcarpathian Regional Museum of Local Lore (TRMLL) named after T. Legotskyi and to analyze the newest interpretation design models of expositional space. The obtained results, interpret them through philosophical models of interior design, take into account stylistic features; needs of society, trends and advanced technologies in the field of environment design. Research methods. The research is based on ideology, imagery, philosophical interpretation, art history and source studies. As well as modern methods of three-dimensional modeling, texturing, rendering and post-production of the obtained visualizations. The scientific novelty. The article suggests and theoretically substantiates design concepts, philosophical interpretation of interior design and technological equipment. New ideas dealing with exhibitional space and museum exhibition arrangement were put forward. It was successfully managed to combine medieval, Renaissance and baroque fortification architecture, historical design of residential palace interior with modern technologies and plastics. Conclusions. Nowadays interior of palace building of T.Legoskyi TRMLL Uzhhorod Castle is in the state of emergency condition, needs capital repair and restoration. Having analyzed academic works of Transcarpathian historians and having studied the modern condition of Uzhhorod Castle, it appeared to be possible to reveal problems pertaining expositional space arrangement of T.Legoskyi TRMLL- old equipment, the necessity to heat premises and their repair, and the main issue- the need to renovate, create new interior design, which is to be based on sources and at the same time on rethinking of stylistic layers. The achieved interpretation models demonstrare possible ways to renovate exhibition space of the palace building, fully open author ambitions and ideas. The imsges found symbolize continuity of time, rethink medieval, Renaissance and baroque aesthetics-combine the new technologies, modern art trends and authentic paintings and reliefs. Museum T.Legotskyi TRMLL archive exhibits do not fall out from the context, they emphasize specificity of premises and architectural complex in general. Historic continuity and strong stylistic onnection in suggested interpretation models is observed.