Cerebral hemorrhage and cerebral infarction are different in nature and treatment methods, so early and clear diagnosis is needed. (1) Patients with cerebral hemorrhage have a history of hypertension and cerebral atherosclerosis, while patients with cerebral infarction have a history of transient ischemic attack or heart disease. (2) Cerebral hemorrhage tends to develop under emotional or exertional conditions, while cerebral infarction tends to develop at quiet rest. (3) Cerebral hemorrhage has rapid onset and progresses rapidly, often peaking within a few hours, with no aura before onset. In contrast, cerebral infarction progresses slowly, often gradually worsens after 1 to 2 days, and there is often a history of transient ischemic attack before onset. (4) Patients with cerebral hemorrhage often have symptoms of increased intracranial pressure such as headache, vomiting, and neck straightening after the onset, and their blood pressure is also high, and they have heavy impairment of consciousness. At the onset of cerebral infarction, the blood pressure is more normal, and there are no symptoms such as headache and vomiting, and the consciousness is clear. (5) The cerebrospinal fluid pressure of lumbar puncture in patients with cerebral hemorrhage is high and mostly bloody, while the cerebrospinal fluid pressure in patients with cerebral infarction is not high and clear and colorless. (6) Central respiratory disturbances are common in patients with cerebral hemorrhage, and the pupils are often asymmetrical, or both pupils are narrowed, and the eyes are homogeneously skewed and floating. In patients with cerebral infarction, central respiratory disturbances are rare, with symmetrical pupils on both sides, and the eyes are rarely deviated and floating. Of course, individual patients with mild cerebral hemorrhage have mild clinical symptoms and are similar to cerebral infarction, so it is difficult to distinguish between the two. In contrast, patients with large cerebral infarction, when they have increased intracranial pressure and impaired consciousness, they also resemble cerebral hemorrhage and are clinically indistinguishable. We should strive to do CT scan examination as early as possible. Brain hemorrhage has a high-density shadow on CT, while cerebral infarction has a low-density shadow, which is very different from each other.