A microneedle treatment apparatus includes a microneedle treatment head, which further includes a housing having a receiving chamber and a treatment port communicating with the receiving chamber a microneedle device disposed in the receiving chamber and including a microneedle base and at least one microneedle fixed to the microneedle base and extending toward the treatment port and a cold end conducting portion fixed in the receiving chamber and including a contact end exposed to the treatment port and a heat-conducting end which conductively connects to the contact end and a cold output end of a cooling output device. The microneedle treatment apparatus can perform cold treatment through the contact between the cold end conducting portion and the treated area, so that the side effect of microneedle therapy can be reduced. A variable frequency RF treatment system includes an inverter circuit, an impedance matching circuit and a controller.
