This paper describes the experimental facilities for the quantitative analysis on the infiltration, which is constructed in the baseball field, University of Tokyo. Th is facilities consist of 10 blocks, each of 12 m × 21.5 m, with permeable pavement. These blocks have some arrangements of depth of permeable strata, number of drain pipes, with or without water tight sheets and so on. On the construction stage, many sensors and measurement devices have been installed in the basement and strata, which are rainfall gauge, lysimeters for the measurement of evaporation, water level sensors in the strata, tensiometers temperature sensors, pipes for drainage from the permeable strata and its measurement facilities. These hydrological informations have been collected every 4minutes, for 3 years, with self-made soft wares, controlled by the most popular personal computer and have been also used for the theoritical analysis. This paper introduces the results of the summary of the observation records and several remarks and also proposed new simulation models which are derived from the tremendous volume of data.