Hydraulic oil cylinder control device and hydraulic system

The invention provides a hydraulic oil cylinder control device and a hydraulic system, relates to the technical field of hydraulic control, and aims to solve the problem of low positioning accuracy of an existing hydraulic oil cylinder. The hydraulic oil cylinder control device comprises a first balance valve, a second balance valve and a proportional servo valve which are respectively communicated with a rodless cavity and a rod cavity of a hydraulic oil cylinder, the proportional servo valve is provided with an oil inlet used for being communicated with a hydraulic pump, an oil return opening used for being communicated with an oil return tank, a first oil opening communicated with the first balance valve and a second oil opening communicated with the second balance valve. The proportional servo valve is configured to be switched among a first state in which the oil inlet is communicated with the first oil port and the second oil port is communicated with the oil return port, a second state in which the oil