1、 The positioning scheme of the video monitoring system shall be defined
In other words, I should clearly understand what requirements the video surveillance system should meet. For example, whether to adopt analog monitoring system or network HD monitoring system. Simulation is rarely used now. We mainly study network video surveillance system.

2、 Precautions
Choice of camera definition: the scheme of video surveillance system is to use 1 million cameras, or 1.3 million, 2 million and 3 million.
What brand of monitoring equipment to use: those with sufficient budget and high requirements can choose well-known brands. If they are private enterprises with limited budget, they can also use other domestic brands. Such brands are countless in the market, cheaper than well-known brands, and have almost the same functions.

Storage time of camera: Generally speaking, it is a common practice in the industry for the monitoring system to save video for one month. Because the video files of network HD products are relatively large (1.3 million pieces / road need 21g hard disk every day, and 2 million pieces / road need 40g hard disk every day), the hard disk space is relatively large. If the budget is limited, it can also be recorded for a week or half a month. It depends on their actual situation.

Select appropriate display equipment: Generally speaking, small video monitoring system is camera plus display or monitor. Large monitoring systems generally need to use digital decoding matrix, TV wall, etc. The small monitoring system can use a display or a professional display as the display output of the camera. It should be noted that the display should not be turned on 24 hours a year, but the display can be turned on continuously for 365 days. Of course, the cost of a monitor is much more expensive than a monitor of the same size. Therefore, large-scale video monitoring system generally adopts professional industrial monitor as the monitoring system of display equipment.

Choose the right supplier: whether you buy your own monitoring equipment, install it yourself, or find a monitoring installation company to install it, you need to consider the strength and after-sales service level of the company, such as registered capital, establishment time and safety qualification. Because the video surveillance system involves security issues, we should not be careless. We should fully consider the follow-up technical service and after-sales maintenance.