Historically the museums of natural history have been considered as institutions that care for collections of specimens with scientific and cultural importance. However, the continuing acceleration in the digitization of information, combined with the increasing capacity of digital information storage, is redefining the traditional role of museums. Museums might be seen as huge sources of information about the occurrence of organisms over time and across the planet. In this sense, the Natural History Museum of Barcelona is making a real effort to offer this data to the scientific community. It holds about 1.5 million arthropod specimens, from which 3,650 are Type specimens, mainly from Coleopteran families and cave-dwelling fauna. To supply this amount of data requires documenting all specimens, and to develop and keep up the appropriate tools of managing, storing and promotion of this data. Although the amount of data available in such Biodiversity Portals like GBIF is still reduced, we are working hard to increase this proportion in a short future, with special emphasis on comprehensiveness and reliability of data. The current lack of available information of old distribution of many insects species makes it difficult to assess the consequences of environmental issues like global warming or isolation and fragmentation of non-cropped habitats. Therefore, we are collaborating with Natural Reserves technicians in order to evaluate the impact of the speleological activity on cave-dwelling fauna, in which we combine the information providing from new catches with revisions of old specimens, in order to assess the changes at space and time scales.