Non-destructive archaeological methods play a significant role in acquiring the information about archaeological sites. The most often used are geophysical methods, especially the magnetic and geoelectric ones. As part of the project CEVNAD, several geophysical measurements were carried out in the years 2010 to 2014, in the river basins of the Hron, Ipeľ and Žitava, as well as in the Košická kotlina and in the territory of Spiš. The excavation was done in such archaeological sites as settlements, fortified settlements, fortresses, temporary Roman camps, burial grounds, churches, fortified areas, etc. The main aim of the measurements was to acquire information, as precise as possible, on the nature of the explored settlement or the deserted architecture (its extent, form, orientation, size of the deserted walls). During five years, magnetic method was used to measure 46 archaeological sites, including such features as ground plans of long houses, channels, stoves, half sunken-floored houses, storage pits, clay pits, fortification systems – ditches, etc. Using GPR survey, 34 archaeological sites were measured during this period. Measurement was focused especially on deserted churches, interiors in churches and monasteries, as well as spaces in fortified areas. In several sites geophysical survey was followed by archaeological survey. The results obtained from the geophysical measuring and archaeological excavation could then be compared and confronted. In most cases, the results were the same.