: The present study and field measurements were carried out at private farms at Khatatpa – Menoufia Governorate and another in Noubaria – Behira Governorate during the period from 2019-2021on Ross 408 and Arbor Acres. The great object of this study was to determine the effect of some environmental factors (such as type of strains and house system) on production and European production efficiency of broiler production in the Menoufia Government. Two densities were applied in the closed system, the first was 17 birds/ m2 (the for floor system) and the second was 41 birds/m2 the cage system). All birds were reared on land with expansive floors. The total No. of birds were 532500 which were presented in farms, in 2 strains Ross 408 (435000 birds) Arbor Acres (97500 birds) are given.The studied traits were used body weights at different ages; Growth rates; Total feed consumption (FC) (kg per bird); Feed conversion ratio (FCR). Results obtained; The average body weight in the floor housing system is higher than the cage housing system during the period from one day to twenty-one days old. The matter was reversed after that, so that body weights in the cage housing system were higher than the floor housing system at 28 and 35 days of age.The statistical differences between the two types of housing systems (floor and cages) were significant (P ≤ 0.05) for body weight at 7, 21 and 28d. of age, and highly significant (P ≤ 0.01) for body weights at 1, 14 and 35 d. of age.Averages of feed/bird, g., feed conversion, feed index and feed/bird /m2 in the floor housing system were 3045.09 ± 3.44 g., 1.61 ± 0.005, 1225.62 ± 4.18 and 53.74 ± 0.13, respectively. Where, the averages of feed/bird, g., feed conversion, feed index, and feed/bird /m2 in the cage housing system were 3182.96 ± 3.23g., 1.66± 0.005, 1213.37 ± 3.93 and 131.17 ± 0.12, respectively. The statistical differences between the two types of housing systems floor and cages) were highly significant (P ≤ 0.01) for feed/bird, g. and feed conversion. But there is no significance (P ≥ 0.05) for feed index and feed/bird /m2. Averages of interval growth rate of Arbor Acres (±S.E) were 128.83 ± 0.47, 79.50 ± 0.61, 67.90 ± 1.46., 46.03 ± 1.41 and, 33.27 ± 0.94 during intervals (1-7, 7-14, 14-21, 21-28, and 28-35) respectively. The statistical differences between the two strains (Arbor Acres and Ross) were significant (P ≤ 0.05) for interval growth rate at (1-7 and 28- 35), where there is no significances at (7-14,14-21 and 21-28). The average gain/bird in Arbor acers (20.15 pounds/ bird) was a little differ from the gain / bird of Ross ( 19.515 pounds/bird). Differences between the two strains were found by breeding numbers/m2, so, Ross has the most gain compared with Arbor acers.