Many nuclear power plants(NPPs) in Japan are approaching the end of their operational lifespan. They need to be decommissioned safely in the near future. By using Augmented Reality(AR), workers can understand information related to decommissioning work intuitively. Three dimensional(3D) reconstruction models of dismantling fields are useful for workers to observe circumstances of dismantling fields without visiting the fields. In this study, an information reference system based on AR and 3D reconstruction models has been developed and evaluated. The evaluation consists of questionnaires and interview surveys with 6 workers at NPP, who used this system along with a scenario. The results showed that it will be possible to reduce the time spent and mistakes in dismantling fields. The results also showed that it is easy to refer information in dismantling fields. However, it was also found that it is difficult for workers to build reconstruction models of dismantling fields by themselves.