Some of the known binary ABO₃perovskites with ferro- (FE) or antiferroelectric (AFE) at TC and different magnetic phase transitions (PT): ferro-and antiferromagnetic at TN and also some of their solid solutions are considered. Some correlations between their FE or AFE and/or magnetic PTs temperatures, on the one hand, and their interatomic bond A–O strains, on the other hand, have been constructed. It is shown that in the plotted diagrams these temperatures change with a change in δAO values as follows: classical FEs are followed by multiferroics, starting with BiFeO₃ and ending with YVO₃, followed by classical AFEs. At the same time, the temperatures TC and TN experience maxima at the corresponding points for BiFeO₃, then quickly decrease, and the difference between them, TC-TN, basically also decreases, slightly increasing along the way to the point EuTiO₃. which made it possible to systematize these TC and TN.Some of the known binary ABO₃perovskites with ferro- (FE) or antiferroelectric (AFE) at TC and different magnetic phase transitions (PT): ferro-and antiferromagnetic at TN and also some of their solid solutions are considered. Some correlations between their FE or AFE and/or magnetic PTs temperatures, on the one hand, and their interatomic bond A–O strains, on the other hand, have been constructed. It is shown that in the plotted diagrams these temperatures change with a change in δAO values as follows: classical FEs are followed by multiferroics, starting with BiFeO₃ and ending with YVO₃, followed by classical AFEs. At the same time, the temperatures TC and TN experience maxima at the corresponding points for BiFeO₃, then quickly decrease, and the difference between them, TC-TN, basically also decreases, slightly increasing along the way to the point EuTiO₃. which made it possible to systematize these TC and TN.